JP6490712B2 - Non-orthogonal multiple access and interference cancellation - Google Patents

Description

Cross reference
[0001] This patent application is a United States by Malladi et al. Entitled "Non-Orthogonal Multiple Access Intercellation" filed on April 29, 2015, each assigned to the assignee of the present application. U.S. Provisional Patent Application No. 61 / 990,099 by Malladi et al., Entitled "Non-Orthogonal Multiple Access And Intercellation", filed May 7, 2014, filed 14 / 700,071. Claim priority of issue.

  [0002] The present disclosure relates to, for example, wireless communication systems, and more specifically to non-orthogonal multiple access and interference cancellation.

  [0003] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple access networks that can support multiple users by sharing available network resources.

  [0004] A wireless communication network may include a number of base stations that can each support communication for a number of user equipments (UEs). A UE may communicate with a base station via downlink and uplink. The downlink (or forward link) refers to the communication link from the base station to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the base station. These systems may be multiple access systems that can support communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems. . In addition, some systems may operate using time-division duplex (TDD) where a single carrier is used for both uplink and downlink communications. Some systems may operate using frequency-division duplex (FDD), where separate carrier frequencies are used for uplink and downlink communications.

  [0005] As wireless communication networks become more congested, operators are seeking ways to increase capacity. Various approaches may include using a small cell, an unlicensed spectrum, or a wireless local area network (WLAN) to offload part of the traffic and / or signaling. Many of the approaches for increasing capacity can cause interference with simultaneous communications in one cell or in adjacent / neighboring cells. For example, a UE in one cell transmits uplink communication while a base station in a neighboring cell may be transmitting a downlink transmission with signal strength that may interfere with uplink communication from the UE. There is a possibility. In other examples, the interference can arise from radios operating in adjacent frequency bands. It may be beneficial to reduce such interference at the UE or base station in order to achieve increased data rate over the wireless communication network.

  [0006] Methods, systems, and devices for hierarchical modulation and interference cancellation in a wireless communication system are described. Communication can be provided in both the base modulation layer and the enhancement modulation layer that is modulated on the base modulation layer and can therefore be provided to the same or different user equipment (UE) Various deployment scenarios that provide simultaneous data streams may be supported. In an example, interfering signals received from within a cell are compensated, interfering signals received from other cells are compensated, and / or received from other radios that may operate in adjacent wireless communication networks. Various interference mitigation techniques can be implemented to compensate for the interfered signal being transmitted.

  [0007] In some examples, a concurrent non-orthogonal wireless communications data stream may be provided from a base station to a UE through hierarchical modulation. Certain content may be selected for transmission on the base modulation layer and different content may be selected for transmission on the enhanced modulation layer. The base modulation layer content may be modulated onto the base modulation layer, and then the enhancement layer content is modulated onto the enhancement modulation layer that is superpositioned to the base modulation layer and one or more It may be sent to the UE. A UE that receives both the base modulation layer and the enhancement modulation layer can decode content received on the base modulation layer and perform interference cancellation to cancel the signal of the base modulation layer. The UE can then decode the content received on the enhanced modulation layer.

  [0008] In some examples, the base modulation layer may support transmissions with a higher probability of successful transmission, and the base modulation layer transmits content with a relatively low error threshold. Can be used. In some examples, the enhanced modulation layer can support transmissions with a relatively low likelihood of successful transmission and can be used for transmission of content with a relatively high error threshold.

  [0009] According to various examples, UEs and base stations can perform various types of interference mitigation on received signals. Such interference reduction is achieved by signals generated from within the serving cell associated with the UE and the base station (intra-cell interference), signals generated from neighboring cells of the serving cell (inter-cell interference). (Inter-cell interference)) and / or signals from transmitters operating according to different communication protocols on the same communication channel in a serving cell, or transmitters in adjacent communication channels (inter-radio interference (inter-cell interference) radio interference)).

  [0010] According to a first aspect of the present disclosure, a method for transmitting hierarchical content includes identifying first content for transmission and first content. Is associated with a first error rate threshold to identify the second content for transmission and the second content is higher than the first error rate threshold. Modulating the first content on the base modulation layer, modulating the second content on the enhancement modulation layer, and superimposing the enhancement modulation layer on the base modulation layer, associated with a rate threshold; Transmitting the superimposed base modulation layer and the enhanced modulation layer. In some examples, the first error rate threshold and the second error rate threshold may be based on a type of information included in the first content and the second content. The first content may include, for example, high priority content, and the second content may include, for example, low priority content. The first content and the second content may be sent to the same UE or may be sent to different UEs.

  [0011] According to some examples, the first content may include control information for the UE configured to receive the first content. Such control information may include, for example, one or more of scheduling grant information, acknowledgment information, or signaling information. In some examples, a UE configured to receive control information may not send an acknowledgment of receipt of control information. In some examples, the second content may include user data, and a UE configured to receive user data may send an acknowledgment of receipt of user data. The control information may be transmitted, for example, using a physical downlink control channel (PDCCH) on the basic modulation layer, and user data is physical downlink shared channel (PDSCH :) on the enhanced modulation layer. physical downlink shared channel). In some examples, the base modulation layer and the enhanced modulation layer may have the same modulation scheme or may have different modulation schemes. The modulation scheme for each of the basic modulation layer and the enhancement modulation layer is, for example, a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature phase shift keying (BPSK) scheme. It may include a phase amplitude modulation (QAM) scheme.

  [0012] In some examples, the first content may include latency sensitive unicast data for the first UE, and the second content may include the first content It may include best effort unicast data for the UE or different UEs. Unicast data that is sensitive to latency may be transmitted using PDSCH on the base modulation layer, and best effort unicast data may be transmitted using PDSCH on the enhanced modulation layer. In some examples, the first content may include broadcast data and the second content may include unicast data for a particular UE. In other examples, the first content may include unicast data and the second content may include broadcast data. Broadcast data may be transmitted using a physical multicast channel (PMCH) on the basic modulation layer, and unicast data may be transmitted using PDSCH on the enhanced modulation layer. In some examples, a UE configured to receive broadcast data may not send an acknowledgment of reception of broadcast data, and a particular UE configured to receive unicast data may An acknowledgment of receipt of the cast data may be sent.

  [0013] In a further example, the method is also based on determining channel state information (CSI) for a channel to be used for transmission of the base modulation layer and the enhanced modulation layer and based on the CSI. Calculating a transmission energy ratio between the base modulation layer and the enhanced modulation layer. Determining the CSI and calculating the transmission energy ratio may be performed for each of a plurality of transmission time intervals (TTIs).

  [0014] Additionally or alternatively, the method can also determine the number of spatial layers available for transmission of each of the base modulation layer and the enhancement modulation layer, and on the determined spatial layer And transmitting the superimposed basic modulation layer and the enhanced modulation layer. Determining the number of spatial layers may be based on, for example, a rank indicator (RI) from at least one UE.

  [0015] The method may also determine, in some examples, CSI for a plurality of UEs, and based on the CSI for each of the plurality of UEs, which of the plurality of UEs is a base modulation layer or Instructing whether one or more of the enhanced modulation layers should be received. In some examples, transmitting the superimposed base layer and the enhanced modulation layer may be to one or more UEs determined to have lower channel quality based on the determined CSI. Transmitting the base modulation layer and transmitting the enhancement modulation layer to one or more UEs determined to have higher channel quality based on the determined CSI.

  [0016] According to some examples, the method may also include transmitting signaling information to at least one UE to receive the superimposed base modulation layer and the enhanced modulation layer. The signaling information can be, for example, a transmission energy ratio between the base modulation layer and the enhancement modulation layer, a transport block size for the base modulation layer and the enhancement modulation layer, or for the base modulation layer and the enhancement modulation layer. One or more of the modulation and coding schemes may be included. In some examples, the signaling information indicates a downlink grant for the UE indicating a downlink resource for the UE on one or more of the base modulation layer or the enhanced modulation layer. ). Such a downlink grant may be, for example, a resource block location, basic modulation layer or enhancement modulation layer of data transmitted to the UE on one or more of the basic modulation layer or the enhancement modulation layer. Modulation and coding scheme (MCS) used to transmit data transmitted to the UE on one or more, used to transmit on one or more of the basic modulation layer or the enhanced modulation layer Precoding matrix, layer mapping for one or more of the basic modulation layer or enhancement modulation layer, code block size for one or more of the basic modulation layer or enhancement modulation layer ( code block size) or one or more of the basic modulation layer or the enhancement modulation layer Number of spatial layers to be indicative of one or more.

  [0017] In some examples, the downlink grant may be a single downlink grant that includes information for each of the base modulation layer or the enhanced modulation layer, or for two or more UEs More than one downlink grant may be included, each downlink grant corresponding to a base modulation layer or an enhanced modulation layer. In some examples, each downlink grant may include a base modulation layer or enhancement modulation layer indication and downlink resources of the indicated base modulation layer or enhancement modulation layer. Such indication of the base modulation layer or enhancement modulation layer may include one or more bits embedded in the downlink grant, or the downlink resource is for the base modulation layer or enhancement modulation layer To indicate that, a cyclic redundancy check (CRC) masked by a cell radio network temporary identifier (C-RNTI) for the UE may be included. According to some examples, the C-RNTI for the basic modulation layer may include a primary cell radio network temporary identifier (PC-RNTI) for the UE, The C-RNTI for may include a secondary cell radio network temporary identifier (SC-RNTI) for the UE.

  [0018] In some examples, the signaling information includes, for example, an energy ratio between a base modulation layer and an enhancement modulation layer, a modulation scheme for the base modulation layer, a modulation scheme for the enhancement modulation layer, a base It may include radio resource control (RRC) signaling, which may include one or more of a resource block size for the modulation layer, or a resource block size for the enhanced modulation layer. The signaling information may be provided using a physical control format indicator channel (PCFICH) in some examples. In some examples, the signaling information may include independent control information for each of the base modulation layer and the enhancement modulation layer.

  [0019] According to a second aspect of the present disclosure, a method for wireless communication receives a signal comprising an enhanced modulation layer superimposed on a base modulation layer and reduces interference from the base modulation layer Therefore, performing interference reduction on the received signal to determine that the data may be decoded from the enhancement modulation layer and decoding the enhancement modulation layer. Determining, in some examples, receiving control signaling from a serving base station indicating that data may be decoded from an enhanced modulation layer Can be included. Such control signaling may include a downlink grant indicating resources to be decoded in the enhanced modulation layer, including basic modulation layer signal characteristics for use in performing interference reduction. Good. Control signaling may be provided at the base modulation layer, for example.

  [0020] According to some examples, performing interference reduction is performed on a linear minimum mean square error (MMSE) for a received signal to reduce interference from a base modulation layer. QR decomposition based sphere decoding (QR-SD) on the received signal to perform mean square error suppression and reduce interference from the fundamental modulation layer Or one or more of performing successive interference cancellation (SIC) on the received signal to reduce interference from the base modulation layer May be included.

  [0021] According to a third aspect of the present disclosure, a method for transmitting hierarchical content includes: receiving a resource grant that identifies a hierarchical modulation resource; Identifying a first content for transmission on the base modulation layer, comprising a modulation layer and an enhancement modulation layer, the base modulation layer having a lower error rate threshold than the enhancement modulation layer; Identifying second content for transmission above, superimposing the enhancement modulation layer on the base modulation layer, and transmitting the superimposed base modulation layer and the enhancement modulation layer.

  [0022] In some examples, the base modulation layer may include a physical uplink control channel (PUCCH) and the enhancement modulation layer includes a physical uplink shared channel (PUSCH). It's okay. In some examples, both the base modulation layer and the enhanced modulation layer may include PUSCH. In a further example, the first content may include high priority content and the second content may include low priority content.

  [0023] According to some examples, receiving a resource grant includes a single uplink grant indicating a hierarchical modulation resource for both a base modulation layer and an enhanced modulation layer to a base station Receiving from. The uplink grant may be, for example, the energy ratio between the base modulation layer and the enhancement modulation layer, the layer mapping information, the code block size, or the number of spatial layers in each of the base modulation layer and the enhancement modulation layer. One or more may be included. In some examples, the uplink grant may also indicate the number of spatial layers for each transmission of the base modulation layer and the enhancement modulation layer. The base modulation layer and the enhancement modulation layer may have the same modulation scheme, or the base modulation layer and the enhancement modulation layer may have different modulation schemes. The modulation scheme for each of the basic modulation layer and the enhancement modulation layer may include a QPSK modulation scheme, a BPSK modulation scheme, or a QAM modulation scheme.

  [0024] In some examples, receiving the resource grant includes receiving a first uplink grant from the base station indicating a hierarchical modulation resource for the base modulation layer, and for the enhancement modulation layer. Receiving a second uplink grant indicating a hierarchical modulation resource from the base station. Each of the first uplink grant and the second uplink grant may include, for example, spatial information indicating the number of spatial layers in the corresponding modulation layer, and / or basic modulation layer or enhancement modulation layer. The indication and an uplink resource of the indicated basic modulation layer or enhancement modulation layer may be included. The indication of the base modulation layer or the enhancement modulation layer is one or more bits embedded in the uplink grant, eg UE to indicate that the uplink resource is for the base modulation layer or the enhancement modulation layer For example, a CRC masked by C-RNTI may be included. The C-RNTI for the base modulation layer may include the PC-RNTI for the UE, and the C-RNTI for the enhanced modulation layer may include the SC-RNTI for the UE.

  [0025] In some examples, the method may also include a transmission energy ratio between the base modulation layer and the enhancement modulation layer, a transport block size for the base modulation layer and the enhancement modulation layer, or a base modulation layer and the enhancement modulation layer. Receiving signaling information, which may include one or more of the modulation and coding schemes for. Signaling information may be received, for example, in RRC signaling and / or in resource grants. In some examples, signaling information may be received on the PCFICH. In a further example, the signaling information may include independent control information for each of the base modulation layer and the enhancement modulation layer. In another example, the first content may include control information transmitted on the PUCCH.

  [0026] In some examples, the control information may include one or more of downlink data acknowledgment, CSI, rank indicator (RI), or scheduling request (SR). The control information may further include, for example, uplink information associated with the enhanced modulation layer. Uplink information associated with the enhanced modulation layer may include a data rate associated with the enhanced modulation layer.

  [0027] According to a fourth aspect of the present disclosure, a method for wireless communication in a UE determines transmission characteristic information of a signal transmitted from a neighboring cell UE. And performing interference reduction on a signal received from a serving cell base station based on the determined transmission characteristic information. Signals transmitted from neighboring cell UEs are, for example, from neighboring cell UEs according to a TDD UL / DL configuration different from the time division duplex (TDD) uplink / downlink (UL / DL) configuration used by the serving cell base station. It may include an uplink subframe that is transmitted to a neighboring cell base station. The TDD UL / DL configuration used by the neighboring cell UE is at least one up transmitted from the neighboring cell UE to the neighboring cell base station, e.g. during a downlink subframe transmitted from the serving cell base station. A link subframe may be included. In some examples, a signal transmitted from a neighboring cell UE may include transmission of at least one device-to-device (D2D) to another neighboring cell node. Such D2D transmissions may be transmitted from neighboring cell UEs, for example during downlink subframes transmitted from the serving cell base station.

  [0028] In some examples, determining the transmission characteristic information includes monitoring transmissions from neighboring cell UEs and transmission characteristics based on transmissions received while monitoring transmissions from neighboring cell UEs. Determining information. The transmission characteristic information may include, for example, one or more of modulation order, number of spatial layers, or precoding information.

  [0029] In some examples, determining transmission characteristic information includes monitoring transmissions from neighboring cell base stations and transmitting based on uplink grant information for uplink transmissions from neighboring cell UEs. Determining characteristic information, wherein uplink grant information is received while monitoring transmissions from neighboring cell base stations. Monitoring transmissions from neighboring cell base stations is based on, for example, monitoring PDCCH of neighboring cell base stations, decoding uplink grants for neighboring cell UEs, and decoded uplink grants. Determining transmission characteristic information of signals transmitted from neighboring cells UE. In some examples, determining transmission characteristic information may include receiving transmission characteristic information from a serving cell base station. The serving cell base station receives transmission characteristic information from, for example, an X2 communications link with a neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. Can be received.

  [0030] According to a fifth aspect of the present disclosure, a method for wireless communication in a serving cell base station determines first transmission characteristic information of a signal transmitted from a neighboring cell base station, and a neighboring cell Determining second transmission characteristic information of a signal transmitted from the UE, and receiving from the UE associated with the serving cell base station based on the determined first transmission characteristic information and second transmission characteristic information; Performing interference reduction on the signal. In some examples, signals transmitted from neighboring cell base stations are transmitted from neighboring cell base stations to neighboring cell UEs according to a TDD UL / DL configuration that is different from the TDD UL / DL configuration used by the serving cell base station. Downlink subframes. The TDD UL / DL configuration used by the neighboring cell base station is, for example, at least one downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE during an uplink subframe transmitted from the serving cell UE. Can be included. In some examples, signals transmitted from neighboring cell UEs are uplink control channel transmissions during uplink subframe transmissions from UEs associated with the serving cell base station. Or it may include one or more of the uplink data channel transmissions.

  [0031] In some examples, the method may also be whether a neighboring cell base station or a neighboring cell UE is transmitting during an uplink subframe transmission from a UE associated with the serving cell base station. Performing interference reduction may be whether a neighboring cell base station or a neighboring cell UE is transmitting during an uplink subframe transmission from a UE associated with the serving cell It can be based on

  [0032] In some examples, determining second transmission characteristic information of a signal transmitted from a neighboring cell UE monitors transmission from the neighboring cell UE and monitors transmission from the neighboring cell UE. Determining second transmission characteristic information of signals transmitted from neighboring cells UE based on transmissions received during The second transmission characteristic information of the signal transmitted from the neighboring cell UE may include, for example, one or more of a modulation order, a number of spatial layers, or precoding information. In some examples, determining second transmission characteristic information of a signal transmitted from a neighboring cell UE monitors transmissions from neighboring cell base stations and monitors transmissions from neighboring cell base stations. Determining uplink grant information for uplink transmissions from neighboring cell UEs based on transmissions received in between.

  [0033] Monitoring transmissions from neighboring cell base stations is based on, for example, monitoring the PDCCH of neighboring cell base stations and transmissions received while monitoring transmissions from neighboring cell base stations, Determining downlink transmission characteristic information for downlink transmission from neighboring cell base stations. In some examples, determining first transmission characteristic information of a signal transmitted from a neighboring cell base station, and determining second transmission characteristic information of a signal transmitted from the neighboring cell UE are: Receiving first transmission characteristic information and second transmission characteristic information over an X2 communication link with a neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. obtain.

  [0034] According to a sixth aspect of the present disclosure, a method for wireless communication at a receiving node comprises a first wireless communication channel (for receiving a wireless transmission from a transmitting node). establishing a wireless communications channel), determining transmission channel information of a second wireless communication channel different from the first wireless communication channel, and transmission channel information of the second wireless communication channel Performing interference reduction on a signal received on the first wireless communication channel from the transmitting node. In some examples, determining transmission channel information for the second wireless communication channel may include decoding a transmission preamble of a wireless transmission on the second wireless communication channel.

  [0035] Performing interference reduction is based, in some examples, on estimating interference from the second wireless communication channel based on the decoded transmission preamble and on estimated interference. Performing interference cancellation on signals received on the first wireless communication channel. The estimated interference is radio frequency (RF) nonlinearity, harmonics introduced from the second wireless communication channel to the first wireless communication channel, the second wireless communication channel. Intermodulation distortion (IMD), channel leakage from the second wireless communication channel, or coupling between the first wireless communication channel and the second wireless communication channel One or more of the following. The transmission channel information of the second wireless communication channel may include co-channel interference between the second wireless communication channel and the first wireless communication channel in some examples. In some examples, the first wireless communication channel and the second wireless communication channel are associated with nodes operating in an unlicensed spectrum according to different wireless transmission protocols.

  [0036] In some examples, the first wireless communication channel may be associated with a node operating in an unlicensed spectrum in accordance with the Long Term Evolution (LTE) protocol, and the second wireless communication channel is May be associated with different nodes operating in the unlicensed spectrum according to the IEEE 802.11 protocol. In other examples, the first wireless communication channel may be associated with a node operating in the unlicensed spectrum according to the IEEE 802.11 protocol, and the second wireless communication channel operates in the unlicensed spectrum according to the LTE protocol. May be associated with different nodes. In a further example, the second wireless communication channel may be an adjacent channel of the first wireless communication channel, and leakage from the adjacent channel may be a signal from the first wireless communication channel. Can cause interference. Such leakage from adjacent channels may cause interference with the signal of the first wireless communication channel, and performing interference reduction is based on the transmission channel information of the second wireless communication channel. Performing interference cancellation on signals received on one wireless communication channel may be included.

  [0037] In some examples, the transmitting node may be, for example, a base station or UE that operates according to the LTE protocol, or may be an access point or station that operates according to the IEEE 802.11 protocol.

  [0038] According to a seventh aspect of the present disclosure, an apparatus for transmitting hierarchical content may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions identify first content for transmission, the first content is associated with a first error rate threshold, identifies second content for transmission, and the second content is first Modulating the first content on the base modulation layer, modulating the second content on the enhancement modulation layer and enhancing, associated with a second error rate threshold that may be higher than the error rate threshold of It may be executable by the processor to superimpose the modulation layer on the base modulation layer and transmit the superposed base modulation layer and the enhanced modulation layer. In some examples, an apparatus may implement one or more aspects of the first aspect of the present disclosure described above.

  [0039] According to an eighth aspect of the present disclosure, an apparatus for wireless communication may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions receive a signal comprising an enhancement modulation layer superimposed on the base modulation layer, and perform interference reduction on the received signal to reduce interference from the base modulation layer, thereby enhancing the data modulation. It can be performed by the processor to determine that it may be decoded from the layer and to decode the enhancement modulation layer. In some examples, an apparatus may implement one or more aspects of the second aspect of the present disclosure described above.

  [0040] According to a ninth aspect of the present disclosure, an apparatus for transmitting hierarchical content may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions receive a resource grant that identifies a hierarchical modulation resource, the hierarchical modulation resource comprises a base modulation layer and an enhancement modulation layer, the base modulation layer having a lower error rate threshold than the enhancement modulation layer The first content is identified for transmission on the modulation layer, the second content is identified for transmission on the enhancement modulation layer, the enhancement modulation layer is superimposed on the base modulation layer, and the superimposed base It may be executable by the processor to transmit the modulation layer and the enhancement modulation layer. In some examples, an apparatus may implement one or more aspects of the third aspect of the present disclosure described above.

  [0041] According to a tenth aspect of the present disclosure, an apparatus for wireless communication at a user equipment may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions are executed by a processor to determine transmission characteristic information of a signal transmitted from a neighboring cell UE and perform interference reduction on a signal received from a serving cell base station based on the determined transmission characteristic information It may be possible. In some examples, an apparatus may implement one or more aspects of the fourth aspect of the present disclosure described above.

  [0042] According to an eleventh aspect of the present disclosure, an apparatus for wireless communication in a serving cell base station may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instruction determines first transmission characteristic information of a signal transmitted from the neighboring cell base station, determines second transmission characteristic information of a signal transmitted from the neighboring cell UE, and determines the determined first transmission characteristic. Based on the information and the second transmission characteristic information, it may be executable by the processor to perform interference cancellation on the signal received from the serving cell UE. In some examples, an apparatus may implement one or more aspects of the fifth aspect of the present disclosure described above.

  [0043] According to a twelfth aspect of the present disclosure, an apparatus for wireless communication at a receiving node may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions establish a first wireless communication channel for receiving a wireless transmission from a transmitting node, determine transmission channel information for a second wireless communication channel that is different from the first wireless communication channel, and a second wireless Based on the transmission channel information of the communication channel, it may be executable by the processor to perform interference reduction on signals received on the first wireless communication channel from the transmitting node. In some examples, an apparatus may implement one or more aspects of the sixth aspect of the present disclosure described above.

  [0044] According to a thirteenth aspect of the present disclosure, an apparatus for transmitting hierarchical content includes means for identifying first content for transmission and the first content is a first error. Means for identifying second content for transmission associated with a rate threshold; and a second error rate threshold, wherein the second content may be higher than the first error rate threshold; Associated means for modulating the first content on the base modulation layer, means for modulating the second content on the enhancement modulation layer, and means for superimposing the enhancement modulation layer on the base modulation layer And means for transmitting the superimposed base modulation layer and the enhanced modulation layer. In some examples, an apparatus may implement one or more aspects of the first aspect of the present disclosure described above.

  [0045] According to a fourteenth aspect of the present disclosure, an apparatus for wireless communication includes means for receiving a signal comprising an enhancement modulation layer superimposed on a base modulation layer, and interference from the base modulation layer. Means for determining that data may be decoded from the enhancement modulation layer by performing interference reduction on the received signal to reduce, and for decoding the enhancement modulation layer Means. In some examples, an apparatus may implement one or more aspects of the second aspect of the present disclosure described above.

  [0046] According to a fifteenth aspect of the present disclosure, an apparatus for transmitting hierarchical content includes means for receiving a resource grant identifying a hierarchical modulation resource, and the hierarchical modulation resource is a basic modulation layer. And means for identifying the first content for transmission on the base modulation layer, wherein the base modulation layer has a lower error rate threshold than the base modulation layer; Means for identifying second content for transmission above, means for superimposing the enhancement modulation layer on the base modulation layer, and for transmitting the superimposed base modulation layer and the enhancement modulation layer Means. In some examples, an apparatus may implement one or more aspects of the third aspect of the present disclosure described above.

  [0047] According to the sixteenth aspect of the present disclosure, an apparatus for wireless communication is based on means for determining transmission characteristic information of a signal transmitted from a neighboring cell UE and the determined transmission characteristic information. Means for performing interference cancellation on signals received from the serving cell base station. In some examples, an apparatus may implement one or more aspects of the fourth aspect of the present disclosure described above.

  [0048] According to a seventeenth aspect of the present disclosure, an apparatus for wireless communication includes: means for determining first transmission characteristic information of a signal transmitted from a neighboring cell base station; Means for determining second transmission characteristic information of a signal to be transmitted, and interference with a signal received from the serving cell UE based on the determined first transmission characteristic information and second transmission characteristic information Means for performing the removal. In some examples, an apparatus may implement one or more aspects of the fifth aspect of the present disclosure described above.

  [0049] According to an eighteenth aspect of the present disclosure, an apparatus for wireless communication includes: means for establishing a first wireless communication channel for receiving a wireless transmission from a transmitting node; Means for determining transmission channel information of a second wireless communication channel different from the communication channel and received on the first wireless communication channel from the transmitting node based on the transmission channel information of the second wireless communication channel. Means for performing interference reduction on the signal. In some examples, an apparatus may implement one or more aspects of the sixth aspect of the present disclosure described above.

  [0050] According to a nineteenth aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code identifies first content for transmission, the first content is associated with a first error rate threshold, identifies second content for transmission, and second The content modulates the first content on the base modulation layer and the second content on the enhancement modulation layer, which is associated with a second error rate threshold that may be higher than the first error rate threshold. It may be executable by the processor to modulate, superimpose the enhancement modulation layer on the base modulation layer, and transmit the superimposed base modulation layer and the enhancement modulation layer. In some examples, the non-transitory computer readable medium may implement one or more aspects of the first aspect of the present disclosure described above.

  [0051] According to a twentieth aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code receives a signal comprising an enhancement modulation layer superimposed on the base modulation layer, and performs interference reduction on the received signal to reduce interference from the base modulation layer. May be executable by the processor to determine that the data is likely to be decoded from the enhancement modulation layer and to decode the enhancement modulation layer. In some examples, the non-transitory computer readable medium may implement one or more aspects of the second aspect of the present disclosure described above.

  [0052] According to a twenty-first aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code receives a resource grant that identifies a hierarchical modulation resource, the hierarchical modulation resource comprising a base modulation layer and an enhancement modulation layer, wherein the base modulation layer has a lower error rate threshold than the enhancement modulation layer. Identifying first content for transmission on the base modulation layer, identifying second content for transmission on the enhancement modulation layer, superimposing the enhancement modulation layer on the base modulation layer, It may be executable by the processor to transmit the superimposed base modulation layer and the enhancement modulation layer. In some examples, the non-transitory computer readable medium may implement one or more aspects of the third aspect of the present disclosure described above.

  [0053] According to a twenty-second aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code determines transmission characteristic information of a signal transmitted from the neighboring cell UE, and performs interference reduction on the signal received from the serving cell base station based on the determined transmission characteristic information. May be executable by the processor. In some examples, the non-transitory computer readable medium may implement one or more aspects of the fourth aspect of the present disclosure described above.

  [0054] According to a twenty-third aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code determines transmission characteristic information of a signal transmitted from the neighboring cell base station, determines transmission characteristic information of a signal transmitted from the neighboring cell UE, and based on the determined information, the serving cell UE May be executable by the processor to perform interference cancellation on the signal received from. In some examples, the non-transitory computer readable medium may implement one or more aspects of the fifth aspect of the present disclosure described above.

  [0055] According to a twenty-fourth aspect of the present disclosure, a non-transitory computer-readable medium storing computer-executable code for wireless communication is described. In one configuration, the code establishes a first wireless communication channel for receiving a wireless transmission from a transmitting node, determines transmission channel information for a second wireless communication channel that is different from the first wireless communication channel, and Based on the transmission channel information of the second wireless communication channel, it may be executable by the processor to perform interference reduction on signals received on the first wireless communication channel from the transmitting node. In some examples, a non-transitory computer readable medium may implement one or more aspects of the sixth aspect of the present disclosure described above.

  [0056] Further scope of the applicability of the described methods and apparatus will become apparent from the following detailed description, claims, and drawings. Since various changes and modifications within the spirit and scope of the detailed description will become apparent to those skilled in the art, the detailed description and specific examples are given by way of illustration only.

  [0057] A better understanding of the nature and advantages of the present disclosure may be realized by reference to the following drawings. In the appended figures, similar components or features may have the same reference number. Furthermore, various components of the same type can be distinguished by following a reference sign by a dash and a second sign that distinguishes similar components. Where only the first reference number is used herein, the description is applicable to any one of the similar components having the same first reference number regardless of the second reference number. .

[0058] FIG. 10 is an illustration of an example wireless communication system in accordance with various examples. [0059] FIG. 11 illustrates hierarchical modulation and interference cancellation environments in accordance with various examples. [0060] FIG. 9 is a flowchart of a method for hierarchical modulation of content at a base station, according to various examples. [0061] FIG. 9 is a block diagram of a device that may be used for hierarchical modulation, according to various examples. [0062] FIG. 12 shows a base layer, an enhancement layer, and a modulation scheme for the resulting transmission, according to various examples. [0063] FIG. 15 shows a hierarchical modulation scheme and the possibility of successful enhancement layer decoding in different user equipments (UEs) that may be served by an evolved NodeB (eNB). [0064] FIG. 9 illustrates a hierarchical modulation environment, according to various examples. [0065] FIG. 10 illustrates another hierarchical modulation environment, according to various examples. [0066] FIG. 10 illustrates another hierarchical modulation environment, according to various examples. [0067] FIG. 9 is a block diagram of a device that may be used for hierarchical modulation, according to various examples. [0068] FIG. 9 is a flowchart of a method for hierarchical modulation of content at a base station, according to various examples. [0069] FIG. 9 is a flowchart of another method for hierarchical modulation of content at a base station, according to various examples. [0070] FIG. 10 is a block diagram of a device that may be used for hierarchical modulation and interference cancellation, according to various examples. [0071] FIG. 9 is a flowchart of a method for hierarchical modulation and interference cancellation of content in user equipment, according to various examples. [0072] FIG. 12 is another block diagram of a device that may be used for hierarchical modulation and interference cancellation, according to various examples. [0073] FIG. 9 is a block diagram of a device that may be used for hierarchical modulation in user equipment, according to various examples. [0074] FIG. 9 is a flowchart of a method for hierarchical modulation of content in user equipment, according to various examples. [0075] FIG. 11 illustrates a hierarchical modulation environment, according to various examples. [0076] FIG. 12 is another block diagram of a device that may be used for hierarchical modulation in user equipment, according to various examples. [0077] FIG. 12 is a block diagram of a device that may be used for hierarchical modulation and interference cancellation at a base station, according to various examples. FIG. 7 is a block diagram of a device that may be used for hierarchical modulation and interference cancellation at a base station, according to various examples. [0078] FIG. 9 is a flowchart of a method for hierarchical modulation and interference cancellation of content in a base station, according to various examples. [0079] FIG. 18 illustrates a wireless communication system and an interference cancellation environment in accordance with various examples. [0080] FIG. 9 illustrates a time division duplex uplink / downlink configuration in a wireless communication system, according to various examples. [0081] FIG. 9 is a flowchart of a method for inter-cell interference reduction, according to various examples. [0082] FIG. 12 is a block diagram of a device that may be used for inter-cell interference reduction in user equipment according to various examples. [0083] Another flowchart of a method for inter-cell interference reduction, according to various examples. [0084] FIG. 10 illustrates a wireless communication system and an interference reduction environment in accordance with various examples. [0085] Another flowchart of a method for inter-cell interference reduction, according to various examples. [0086] Another flowchart of a method for inter-cell interference reduction, according to various examples. [0087] FIG. 12 is a block diagram of a device that may be used for inter-cell interference reduction in user equipment according to various examples. [0088] FIG. 10 illustrates another wireless communication system and interference reduction environment, according to various examples. [0089] Another flowchart of a method for inter-cell interference reduction, according to various examples. [0090] FIG. 9 is a block diagram of another device that can be used for inter-cell interference reduction in user equipment, according to various examples. [0091] FIG. 14 is a diagram illustrating another wireless communication system and interference cancellation environment, according to various examples. [0092] FIG. 10 is a block diagram of a device that may be used for inter-radio interference cancellation at user equipment, according to various examples. [0093] FIG. 12 is a flowchart of a method for inter-radio interference cancellation, according to various examples. [0094] FIG. 10 is a flowchart of another method for inter-radio interference cancellation, according to various examples. [0095] FIG. 12 is a block diagram illustrating an example of a base station architecture, according to various examples. [0096] FIG. 10 is a block diagram illustrating an example UE architecture, according to various examples. [0097] FIG. 12 is a block diagram illustrating an example of a multiple-input multiple-output (MIMO) communication system, according to various examples. [0098] FIG. 12 is a flowchart of a method for wireless communication, according to various examples. [0099] FIG. 10 is a flowchart of another method for wireless communication, according to various examples. [0100] A flowchart of another method for wireless communication, according to various examples. [0101] A flowchart of another method for wireless communication, according to various examples. [0102] A flowchart of another method for wireless communication, according to various examples. [0103] FIG. 10 is a flowchart of another method for wireless communication, according to various examples.

  [0104] Techniques for interference reduction and hierarchical modulation within a wireless communication system are described. A base station (eg, evolved Node B (eNB)) and / or user equipment (UE) may be configured to operate within a wireless communication system and is modulated on a base modulation layer and a base modulation layer. Wireless communications can be transmitted / received both on the modulation layer. Thus, simultaneous, non-orthogonal data streams may be provided to the same or different UEs, with each modulation layer having content that can be selected based on specific deployment and / or channel conditions. Can be used to transmit. In examples, interfering signals received from within a cell are compensated, interfering signals received from other cells are compensated, and / or received from other radios that may operate in adjacent wireless communication networks. Various interference reduction techniques may be implemented to compensate.

  [0105] In some examples, simultaneous non-orthogonal wireless communication data streams may be provided from the base station to the UE through hierarchical modulation, and the first content is selected for transmission on the base modulation layer. Different content may be selected for transmission on the enhanced modulation layer. Base modulation layer content may be modulated onto the base modulation layer, and enhancement layer content may then be modulated onto the enhancement modulation layer. The enhanced modulation may be superimposed on the base modulation layer and transmitted to one or more UEs. In various examples, the UE may transmit multiple hierarchical layers to the base station in a similar manner.

  [0106] A UE that receives both the base modulation layer and the enhancement modulation layer may decode the content received on the base modulation layer and then perform interference cancellation to cancel the base modulation layer signal . The UE can then decode the content received on the enhanced modulation layer.

  [0107] In some examples, the base modulation layer may support transmissions with a higher probability of successful transmission, and the base modulation layer may be used to transmit content with a relatively low error threshold . In some examples, the enhanced modulation layer can support transmissions with a relatively low likelihood of successful transmission and can be used for transmission of content with a relatively high error threshold.

  [0108] According to various examples, the UE and the base station can perform interference reduction on the received signal. Such interference reduction is achieved by signals generated from within the serving cell associated with the UE and the base station (intra-cell interference), signals generated from neighboring cells of the serving cell (inter-cell interference (inter-cell interference)). interference)) and / or for signals from adjacent communication channels (inter radio interference).

  [0109] The techniques described herein are not limited to Long Term Evolution (LTE), but for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. Can also be used. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA). CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 Release 0 and A are usually called CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is usually called CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), or the like. UTRA includes Wideband CDMA (WCDMA®) and other variants of CDMA. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). The OFDMA system includes Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, and Flash-OFDM. Wireless technologies such as can be implemented. UTRA and E-UTRA are part of the Universal Mobile Telecommunication System (UMTS). LTE and LTE Advanced (LTE-A) are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP®). cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). The techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies. However, the following description describes an LTE system as an example, and LTE terminology is used in much of the description below, but the techniques are applicable outside of LTE applications.

  [0110] Accordingly, the following description provides examples and does not limit the scope, applicability, or configuration of the claims. Changes may be made in the function and configuration of the elements discussed without departing from the spirit and scope of the disclosure. Various embodiments may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in a different order than the described order, and various steps may be added, omitted, or combined. Also, features described in connection with some embodiments may be combined in other embodiments.

  [0111] Referring initially to FIG. 1, the figure illustrates an example of a wireless communication system or network 100. FIG. The wireless communication system 100 includes a base station (or cell) 105, a communication device 115, and a core network 130. Base station 105 may communicate with communication device 115 under control of a base station controller (not shown), which may be part of core network 130 or base station 105 in various embodiments. Base station 105 may communicate control information and / or user data using core network 130 over backhaul link 132. In embodiments, base stations 105 may communicate with each other directly or indirectly through backhaul link 134, which may be a wired communication link or a wireless communication link. The wireless communication system 100 may support operation on multiple carriers (waveform signals of various frequencies). A multi-carrier transmitter may transmit simultaneously modulated signals on multiple carriers. For example, each communication link 125 may be a multicarrier signal modulated according to the various radio technologies described above. Each modulated signal may be transmitted on a different carrier and may carry control information (eg, reference signal, control channel, etc.), overhead information, data, etc.

  [0112] Base station 105 may communicate wirelessly with device 115 via one or more base station antennas. Each of the base station 105 sites may provide communication coverage for a respective coverage area 110. In some embodiments, the base station 105 is a base transceiver station, a wireless base station, an access point, a wireless transceiver, a basic service set (BSS), an extended service set (ESS), a NodeB, an eNodeB (eNB), a Home. It may be referred to as NodeB, Home eNodeB, or some other suitable term. The coverage area 110 of the base station may be divided into sectors (not shown) that constitute only a part of the coverage area. The wireless communication system 100 may include different types of base stations 105 (eg, macrocell base stations or small cell base stations). There may be overlapping coverage areas for various technologies.

  [0113] In some examples, the wireless communication system 100 is an LTE / LTE-A network that supports hierarchical modulation and interference cancellation modes of operation. The wireless communication system 100 may be a heterogeneous LTE / LTE-A network in which different types of eNBs provide coverage in various geographic regions. For example, each eNB 105 may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. Small cells, such as pico cells, femto cells, and / or other types of cells, may include a low power node or LPN. Macrocells typically cover a relatively large geographic area (eg, a few kilometers in radius) and may allow unrestricted access by UEs subscribed to network provider services. Small cells typically cover a relatively small geographic area and have unrestricted access by UEs subscribing to network provider services and / or UEs associated with small cells (eg, limited subscriber groups ( Restricted access by a UE in a closed subscriber group (CSG, a UE for a user at home, etc.) may be allowed. An eNB for a macro cell may be referred to as a macro eNB. An eNB for a small cell may be referred to as a small cell eNB, a femto eNB, or a home eNB. An eNB may support one or multiple (eg, two, three, four, etc.) cells.

  [0114] Core network 130 may communicate with eNB 105 via backhaul link 132 (eg, S1 etc.). The eNBs 105 may also communicate with each other directly or indirectly, for example, via a backhaul link 134 (eg, X2 etc.) and / or via a backhaul link 132 (eg, through the core network 130). The wireless communication system 100 may support synchronous or asynchronous operation. In synchronous operation, eNBs may have similar frame timing and / or gating timing, and transmissions from different eNBs may be approximately aligned in time. In asynchronous operation, eNBs may have different frame timings and / or gating timings, and transmissions from different eNBs may not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

  [0115] The UEs 115 are distributed throughout the wireless communication system 100, and each UE may be fixed or mobile. UE 115 may also be used by those skilled in the art for mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile It may be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology. UE 115 may be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, and so on. A UE may be able to communicate with macro eNBs, pico eNBs, femto eNBs, relays, and the like.

  [0116] The communication link 125 shown in the wireless communication system 100 is an uplink (UL) transmission from the mobile device 115 to the base station 105 and / or a downlink (DL) transmission from the base station 105 to the mobile device 115. Can be included. DL transmissions are sometimes referred to as forward link transmissions, while UL transmissions are sometimes referred to as reverse link transmissions. According to various examples, one or both of UL transmission and DL transmission may include multiple hierarchical modulation layers, where one or more enhanced modulation layers are the basic modulation layers. Can be superimposed. The base modulation layer may be decoded to obtain content that is modulated onto the base modulation layer. The enhancement modulation layer may be decoded by canceling the base modulation layer (and other lower modulation layers, if any) and decoding the resulting signal.

  [0117] In some examples of the wireless communication system 100, various interference cancellation techniques may be utilized, including intra-cell interference cancellation, inter-cell interference cancellation, and inter-radio interference cancellation. Base station 105 as well as UE 115 may support one or more of these or similar modes of operation. OFDMA communication signals may be used in communication link 125 for LTE downlink transmission in the unlicensed spectrum, while SC-FDMA communication signals are used in communication link 125 for LTE uplink transmission. May be. Interference cancellation may be performed on the uplink and downlink. Inter-radio interference may be addressed by base station 105 as well as UE 115. Additional details regarding hierarchical modulation and / or interference cancellation implementations in systems such as the wireless communication system 100, as well as other features and functions relating to the operation of such systems, are provided below with respect to FIGS.

  [0118] FIG. 2 shows a wireless communication system 200 in which an eNB 105-a can communicate with one or more UEs 115 using hierarchical modulation. The wireless communication system 200 may represent aspects of the wireless communication system 100 shown in FIG. 1, for example. In the example of FIG. 2, the eNB 105-a may communicate with several UEs 115-a, 115-b, and 115-c in the coverage area 110-a of the eNB 105-a. In this example, multiple modulation layers may be utilized for wireless communication, in which case a base modulation layer and one or more enhancement modulation layers are connected to eNB 105-a. It can be transmitted to and from the UE 115 at the same time. According to various examples, the base modulation layer can provide more reliable communication between the eNB 105-a and the UE 115, and the UE 115 in the coverage area 110-a needs to retransmit content. It is more likely that the content transmitted on the basic modulation layer can be decoded without doing so. According to various examples, the enhanced modulation layer may provide relatively unreliable communication between the eNB 105-a and the UE 115 compared to the base modulation layer. Thus, transmission on the enhancement modulation layer may be more likely to require retransmission in order for the receiver to successfully decode the content transmitted on the enhancement modulation layer. The modulation and transmission of the basic modulation layer and the enhancement modulation layer are described in more detail below with respect to FIGS.

  [0119] As stated, the enhanced modulation layer may be less likely to be successfully received than the base modulation layer, and the possibility of successful reception depends on the channel conditions between the eNB 105-a and the UE 115. It depends heavily. In some deployments, such as those shown in FIG. 2, UEs 115-a and 115-b may be located relatively close to eNB 105-a in area 205, while UE 115-c May be located closer to the cell edge of the coverage area 110-a. If UEs 115-a and 115-b located in area 205 are determined to have channel conditions that lead to hierarchical modulation, eNB 105-a may indicate that such communication may be utilized and that UE 115-a and 115-b may be signaled. In such a case, communication link 125-a may include both a base modulation layer and an enhanced modulation layer, and UEs 115-a and 115-b may support communication on each of the hierarchical modulation layers. . In this example, UE 115-c located closer to the cell edge of coverage area 110-a and out of area 205 to communicate using the basic modulation layer in communication link 125-b. Can be signaled. Although the communication link 125-b may still be transmitted using both the base modulation layer and the enhancement modulation layer, the UE 115-c may be relatively successful in receiving and decoding content modulated on the enhancement modulation layer. Due to the low, no attempt may be made to decode the enhanced modulation layer.

  [0120] As mentioned above, the basic modulation layer in such a deployment may provide a relatively reliable communication link between UE 115 and eNB 105-a. According to some examples, content transmitted using the base modulation layer may be selected as content that is more desirable to transmit with a lower error rate, and transmitted using the enhanced modulation layer. Content may be selected as content that is not very sensitive to transmission error rates. For example, the base modulation layer may be used to transmit high priority or latency sensitive content. In some examples, the base modulation layer may include control information such as uplink grant information or downlink grant information, acknowledgment information for previous transmissions, and / or other control signaling in addition to user data. In such examples, the enhanced modulation layer may be used to transmit user data that is less sensitive to transmission errors.

  [0121] In another example, the base modulation layer may include unicast data for a particular UE 115 that is sensitive to latency, and the enhanced modulation layer may include unicast data that is less sensitive to latency. The determination of whether the unicast data is to be transmitted using the basic modulation layer or the unicast data to be transmitted using the enhanced modulation layer is, for example, quality of service associated with different unicast data. (QoS: quality of service). For example, data having a high QoS requirement may be transmitted using a basic modulation layer, and data having a best effort QoS requirement may be transmitted using an enhanced modulation layer. In yet a further example, the base modulation layer may be used to transmit broadcast data from the eNB 105-a, and the enhanced modulation layer may be used to transmit unicast data associated with a particular UE 115.

  [0122] In some examples, the base modulation layer may be transmitted without requiring any acknowledgment of receipt of the transmitted data. For example, the basic modulation layer content may be transmitted without the need for a hybrid automatic repeat request (HARQ) acknowledgment / negative acknowledgment of content reception. In some examples, the error rate associated with the base modulation layer may be about 1%, and the error rate associated with the enhanced modulation layer may be higher than 1%, for example 10%. Thus, successful reception of content transmitted using the enhanced modulation layer may need to depend on the retransmission procedure, but the error rate associated with the basic modulation layer may indicate successful content transmission. It may provide certainty that retransmission is not necessary to achieve.

  [0123] In a situation where the possibility of successful reception of the enhanced modulation layer is not so high, such as in the case of UE 115-c, communication between UE 115-c and eNB 105-a is performed using only the basic modulation layer. Can be broken. Accordingly, communications with different UEs 115 may be selectively adapted based on channel conditions, and UEs 115 with appropriate channel conditions may be signaled to receive data on multiple hierarchical modulation layers transmitted simultaneously. This improves the data rate for such UE 115. Similarly, communication with UE 115 with relatively poor channel conditions may be maintained at a data rate that is reliably maintained through the base modulation layer. In some examples, the base modulation layer is a UE reference signal based physical downlink control channel (PDCCH or ePDCCH), physical downlink shared channel (PDSCH), physical multicast channel (PMCH), or high priority data. Can be used to transmit one or more. In an example, the enhanced modulation layer may be used to transmit one or more of UE reference signal based PDSCH or ePDSCH, or low priority data. Similar to that discussed above, the determination of high priority data and low priority data may be made based on QoS parameters associated with the data.

  [0124] Referring now to FIG. 3, illustrated is a flowchart that conceptually illustrates an example of a method for wireless communication in accordance with an aspect of the present disclosure. For clarity, the method 300 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115 described with respect to FIG. 1 and / or FIG. In one example, the eNB or UE may execute one or more sets of codes for controlling functional elements of the eNB or UE to perform the functions described below.

  [0125] At block 305, content for transmission on the base modulation layer is identified. For example, the eNB may identify high priority content or content that is sensitive to latency, similar to those discussed above. Also, as mentioned above, the eNB may determine whether the UE should be sent to the UE based on whether it can reliably receive one or more enhanced modulation layers. Cast content can be identified, and content for transmission on the base modulation layer can be identified according to such a determination. In some examples, the UE may identify content to be transmitted to the eNB on the base modulation layer based on similar criteria. In some examples, the UE may receive signaling from the eNB indicating that content that is on the base modulation layer is to be transmitted.

  [0126] At block 310, content for transmission on the enhanced modulation layer is identified. For example, the eNB may identify low priority content or content that is less sensitive to latency, similar to those discussed above. Also, as mentioned above, the eNB identifies unicast content for the UE to be sent to the UE based on whether the UE can receive the enhanced modulation layer reliably. Content for transmission on the enhanced modulation layer can be identified according to such a determination. In an example, the UE can identify content to be transmitted to the eNB on the enhanced modulation layer based on similar criteria and / or content that is on the enhanced modulation layer should be transmitted Can be received from the eNB.

  [0127] At block 315, base layer content is modulated into a base modulation layer. Such modulation can be, for example, binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), or 16 quadrature amplitude modulation (16QAM), to name just three examples. At block 320, the enhancement layer content is modulated into an enhancement modulation layer. Similar to the modulation of the basic modulation layer, such modulation is binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), or 16 quadrature amplitude modulation (16QAM), to name just three examples. It can be.

  [0128] At block 325, the enhancement modulation layer is superimposed on the base modulation layer. Such superposition results in component superposed constellations according to the modulation used in each of the base and enhancement modulation layers. In the example where the base modulation layer uses QPSK and the enhancement modulation layer uses QPSK, the result is shaped 16QAM. In the example where the base modulation layer uses QPSK and the enhancement modulation layer uses 16QAM, the result is a shaped 64QAM constellation. Further, in the example where the base modulation layer uses 16QAM and the enhancement modulation layer uses 16QAM, the result is a shaped 256QAM constellation. Finally, at block 330, the superimposed base modulation layer and enhancement modulation layer are transmitted. As mentioned above, a receiver such as a UE or eNB that receives the transmitted signal decodes the received signal to obtain the basic modulation layer content and is basic to obtain the enhancement modulation layer. The enhancement modulation layer can be decoded to cancel the interference associated with the modulation layer and to obtain enhancement modulation layer content.

  [0129] FIG. 4 is a block diagram conceptually illustrating a device, such as an eNB, for use in wireless communications, in accordance with aspects of the present disclosure. In some examples, the device 405 may be an example of one or more aspects of the base station or eNB 105 described with respect to FIG. 1 and / or FIG. Device 405 can also be a processor. Device 405 may include a receiver module 410, an eNB hierarchical modulation module 420, and / or a transmitter module 430. Each of these components can communicate with each other.

  [0130] The components of device 405 may be individually or aggregated using one or more application specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Can be implemented. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASICs, field programmable gate arrays (FPGAs), and other semi-custom ICs) that can be programmed in any manner known in the art. Can be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0131] In some examples, the receiver module 410 may be an RF receiver such as a radio frequency (RF) receiver that is operable to receive transmissions on two or more hierarchical modulation layers. Or may include it. The receiver module 410 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of the wireless communication systems 100 and / or 200 described with respect to FIG. 1 and / or FIG. Can be used to receive various types of data and / or control signals (ie, transmissions).

  [0132] In some examples, the transmitter module 430 may transmit on two or more hierarchical modulation layers (eg, through a base modulation layer and one or more enhanced modulation layers). It may be or include an RF transmitter, such as an operable RF transmitter. Receiver module 430 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to transmit various types of data and / or control signals (ie, transmissions).

  [0133] In some examples, the eNB hierarchical modulation module 420 configures multiple hierarchical modulation layers and operates in a wireless communication system that supports transmission on two or more hierarchical modulation layers. The content to be transmitted on each hierarchical modulation layer for device 405 can be determined. For example, as described above with respect to FIGS. 1-3 and as described below for the various examples of FIGS. 5-46, eNB hierarchical modulation module 420 may, for example, Device 405 may be configured to determine content for transmission on layers, modulation of content on each hierarchical modulation layer, and superposition of hierarchical modulation layers for transmission through transmission module 430 it can.

  [0134] In some examples, the eNB hierarchical modulation module 420 may receive a signal from the receiver module 410 that includes multiple hierarchical modulation layers. In such a case, the eNB hierarchical modulation module 420 decodes the base modulation layer, cancels the interference from the base modulation layer from the received signal, and obtains the content from the enhanced modulation layer. Can be decrypted. In some examples, there may be more than one enhancement modulation layer, in which case the eNB hierarchical modulation module 420 performs successive interference cancellation and decoding of each successive modulation layer be able to. Further, eNB hierarchical modulation module 420 in various examples, for example as described above with respect to FIGS. 1-3 and as described below for the various examples of FIGS. One or more parameters associated with each hierarchical modulation layer may be determined and provide signaling to one or more UEs to transmit and / or receive transmissions on the multiple hierarchical modulation layers be able to.

[0135] As discussed above, in various examples, from UEs, eNBs, or other devices, such as UE 115, eNB 105, and / or device 405 of FIG. 1, FIG. 2, and / or FIG. The transmission may include multiple hierarchical modulation layers. FIG. 5 shows an example 500 of a hierarchical modulation layer and the resulting transmission from the superimposed hierarchical modulation layer. In this example, the high QoS basic modulation layer 505 may use QPSK coding and may be represented as {αX _B : X _B εC _B }. Similarly, a low QoS enhancement modulation layer 510 may use QPSK coding and may be represented as {βX _E : X _E εC _E }. The resulting hierarchical constellation 515 formed from the superposition of the constituent basic modulation layer constellation 505 and the enhancement modulation layer constellation 510 is C = {X = αX _B + βX It can be a shaped 16QAM constellation represented as _E }. It should be understood that different modulation schemes can be used for the base modulation layer and / or the enhancement modulation layer, with corresponding changes to the hierarchical constellation. For example, the basic modulation layer can use QPSK and the enhancement modulation layer can use 16QAM, resulting in a shaped 64QAM hierarchical constellation. In another example, the base modulation layer can use 16QAM and the enhancement modulation layer can use 16QAM, resulting in a shaped 256QAM hierarchical constellation. Further, in a similar manner, additional enhancement modulation layers can be superimposed on the hierarchical constellation to provide more than two hierarchical modulation layers.

  [0136] As mentioned, the base modulation layer may be used to provide a high QoS data stream between the UE and the eNB, and the enhanced modulation layer is a low QoS between the UE and the eNB. May be used to provide a data stream. In some situations, as mentioned above, channel conditions between the UE and the eNB may not support enhanced modulation layer transmission and decoding, and communication with UEs having such channel conditions May be performed using a base modulation layer. FIG. 6 shows an example 600 of different UEs 115 that can receive a hierarchical modulation signal 605. Within signal 605 there are a number of clusters 610 representing the base modulation layer, and within each cluster 610 there may be a number of individual points representing the hierarchical modulation layers. The first UE 115-b-1 may have relatively good channel conditions and may receive the hierarchical modulated signal 605 as the received signal 615. Among the received signals 615, the first UE 115-b-1 may be able to distinguish both clusters 610-b and individual points within each cluster 610-b. Thus, the first UE 115-b-1 may be in the area 205 as shown in FIG. 2, for example.

[0137] The second UE 115-c-1 in this example may be closer to the cell edge of the serving cell transmitting the hierarchical modulation signal 605, and the channel quality may be relatively poor, which Results in a received signal 620 in which clusters 610-c may be distinguished but individual points may not be distinguished. Thus, the second UE 115-c-1 can reliably receive and decode the base modulation layer, but not the enhancement modulation layer. In some examples, the serving cell eNB can transmit data to the second UE 115-c-1 using the base modulation layer and to the first UE 115-b-1 using the enhanced modulation layer. Data can be transmitted. In other examples, as discussed above, the base modulation layer may be used to transmit low latency data, high priority data, control data, etc., and the enhanced modulation layer is sensitive to latency. May be used to transmit low data, low priority data, user data, and the like.
[0138] According to some examples, a log likelihood ratio (LLR) for the base modulation layer may be calculated according to the following formula:

Here, LLR _{B, k} is the basic modulation layer LLR for bit k, b _B (k) is the basic modulation layer bit k of symbol x, and C is the constellation of the modulation scheme of the basic modulation layer.
[0139] In some examples, the enhancement modulation layer uses parallel decoding or serial decoding with interference cancellation performed on the base modulation layer. Can be decrypted. In an example using parallel decoding, gray mapping may be used and the LLR may be calculated according to the following equation:

Where LLR _{E, k} is the enhancement modulation layer LLR for bit k, b _E (k) is the enhancement modulation layer bit k of symbol x, and C is the shaped base modulation layer and enhancement modulation layer superimposed. The constellation of the modulation method.
[0140] In an example using serial decoding with interference cancellation performed on the base modulation layer, the LLR may be calculated according to the following equation:

Where LLR _{E, k} is the enhancement modulation layer LLR for bit k, b _E (k) is the enhancement modulation layer bit k of symbol x, C is the constellation of the enhancement layer modulation scheme, and Y _E is It is a reconstructed enhancement modulation layer after interference cancellation of the combined base modulation layer signal and enhancement modulation layer signal.

  [0141] As discussed above, the base modulation layer and the enhanced modulation layer may be used to transmit different content based on one or more of several different factors. Such factors include, for example, system deployment, traffic demand, type of information contained in the content to be transmitted, channel conditions, number of UEs capable of receiving multiple modulation layers, There may be and / or the number of UEs that can only receive the base modulation layer. FIG. 7 shows a wireless communication system 700 in which eNB 105-b can communicate with UE 115-d using hierarchical modulation. Although only one UE 115-d is shown, it will be readily appreciated that the eNB 105-b may be communicating with multiple UEs. The wireless communication system 700 may represent aspects of the wireless communication system 100 and / or 200 shown in FIGS. 1 and / or 2, for example. In this example, multiple modulation layers may be utilized for wireless communication, in which case base modulation layer 705 and enhancement modulation layer 710 may be transmitted simultaneously between eNB 105-b and UE 115-d. Although a single enhancement modulation layer 710 is shown in FIG. 7, other examples may include more than one enhancement modulation layer. In a manner such as that described above with respect to FIGS. 3-6, the enhanced modulation layer 710 may be superimposed on the base modulation layer 705 and in a single communication link between the eNB 105-b and the UE 115-d. May be sent.

  [0142] According to this example, the basic modulation layer 705 can provide more reliable communication between the eNB 105-b and the UE 115-d, and the UE 115-d can receive and decode the basic modulation layer 705. Can result in a relatively high certainty of being able to succeed. In this example, UE 115-d does not send an acknowledgment (ACK) or negative acknowledgment (NACK) that it received a transmission on the base modulation layer, such as according to HARQ techniques. Eliminating such feedback may increase capacity on the base modulation layer as there is less overhead associated with HARQ ACK / NACK transmissions and associated retransmissions. Due to the relatively high reliability of the base modulation layer 705, content that can benefit from the high reliability and reduced latency of the transmission of the base modulation layer 705 may be selected for transmission on the base modulation layer. For example, as discussed above, the base modulation layer 705 may communicate high priority content, latency sensitive content, and / or control / signaling information from the eNB 105-b to the UE 115-d. Can be selected.

  [0143] According to various examples, the enhanced modulation layer 710 may provide relatively unreliable communication between the eNB 105-b and the UE 115-d compared to the base modulation layer 705. Accordingly, UE 115-d may perform HARQ techniques for enhanced modulation layer 710 transmissions, so that successfully received and undecoded transmissions may be retransmitted by eNB 105-b. According to some examples, the base modulation layer 705 may have an error rate of about 1% and the enhanced modulation layer 710 may have an error rate of about 10%. As noted above, in some examples, the eNB 105-b may identify the first content for transmission on the base modulation layer 705.

  [0144] In some examples, the first content may be associated with a first error rate threshold that defines an error rate in the initial transmission that is requested or desired for the first content. The first error rate threshold may be determined based on, for example, the type of information included in the first content. The eNB 105-b may also identify the second content for transmission on the enhanced modulation layer 710. In some examples, the second content may be associated with a second error rate threshold that is higher than the first error rate threshold. The second error rate threshold may be determined based on, for example, the type of information included in the second content. For example, the first content may include high priority content and the second content may include low priority content. As used herein, the term “error rate threshold” may include a target or desired reliability threshold, or another reliability associated with the data or An error rate measure may be included.

  [0145] In another example, the first content may include control information that may be used by the UE 115-d for communication with the eNB 105-b. For example, the control information may include scheduling grant information, acknowledgment information, and / or signaling information, and the control information may be transmitted on the base modulation layer 705 (using PDCCH. The second content is For example, may include user data that may be transmitted using PDSCH on enhanced modulation layer 710. In yet another example, the first content may include unicast data that is sensitive to latency for UE 115-d. The second content may include best effort unicast data for UE 115-d or for a different UE, for example, unicast data that is sensitive to latency may be on the base modulation layer 705, for example. May be transmitted using PDSCH, and Over preparative unicast data, the PDSCH on enhanced modulation layer 710 may be transmitted using.

  [0146] Similar to that discussed above with respect to FIGS. 3-6, eNB 105-b modulates the first content on base modulation layer 705 and modulates the second content on enhancement modulation layer 710. can do. The eNB 105-b may then superimpose the enhancement modulation layer 710 on the base modulation layer 705 and transmit the superposed base modulation layer 705 and the enhancement modulation layer 710 to the UE 115-d. Thus, in this example, both the base modulation layer 705 and the enhancement modulation layer 710 contain content that is transmitted to the same UE, ie UE 115-d. In other examples, the basic modulation layer 705 content may be transmitted to a UE that is different from the UE to which the enhanced modulation layer 710 content is transmitted. UE 115-d (and other UEs operating in system 700) may have either a base modulation layer 705 or an enhanced modulation layer 710 for which a downlink grant is provided to UE 115-d for a specific time period (eg, via PDCCH). Control signaling may be received from eNB 105-b indicating whether to be decoded for one or more subframes indicated in FIG.

  [0147] Referring now to FIG. 8, illustrated is a wireless communication system 800 in which an eNB 105-c can communicate with UE 115-e and UE 115-f using hierarchical modulation. The wireless communication system 800 may represent aspects of the wireless communication systems 100, 200, and / or 700 shown in FIGS. 1, 2, and / or 7, for example. In this example, as above, multiple modulation layers may be utilized for wireless communication, in which case the base modulation layer 805 and the enhanced modulation layer 810 are eNB 105-c and UE 115-e and UE 115-f. Can be transmitted simultaneously. In this example, base modulation layer 805 may include broadcast data that is transmitted to multiple different UEs, such as UE 115-e and UE 115-f.

  [0148] In this example, the enhancement modulation layer 810 may be superimposed on the base modulation layer 805 and include unicast data for the UE 115-e. The enhancement modulation layer and the base modulation layer may be transmitted in a single communication link between the eNB 105-c and the UE 115-e in a manner such as the manner described above with respect to FIGS. In this example, even though UE 115-f may have sufficient channel quality to receive and decode enhanced modulation layer 810, UE 115-f does not include content for enhanced modulation layer 810 for UE 115-f. Based on that, the enhancement modulation layer 810 can be ignored. In some examples, the eNB 105-c provides signaling to the UEs 115-e and 115-f indicating that the first UE 115-e is scheduled to receive unicast data via the enhanced modulation layer 810. can do. Accordingly, the second UE 115-f that has not received the downlink grant on the enhancement modulation layer 810 can ignore the enhancement modulation layer 810 and decode the information included in the base modulation layer 805.

  [0149] In some examples, broadcast data provided on the base modulation layer 805 may be transmitted using a physical multicast channel (PMCH), and unicast data provided on the enhanced modulation layer 810 is , May be transmitted using PDSCH. In some examples, UEs 115-e and 115-f receive broadcast data on the base modulation layer and do not send an acknowledgment of reception of broadcast data. In the example, UE 115-e receiving unicast data via enhanced modulation layer 810 performs HARQ technique on the received unicast data and transmits ACK / NACK that unicast data has been received. be able to.

  [0150] Referring now to FIG. 9, illustrated is a wireless communication system 900 in which an eNB 105-d can communicate with UE 115-g and UE 115-h using hierarchical modulation. The wireless communication system 900 may represent aspects of the wireless communication systems 100, 200, 700, and / or 800 shown, for example, in FIG. 1, FIG. 2, FIG. 7, and / or FIG. In this example, as above, multiple modulation layers may be utilized for wireless communication, in which case the base modulation layer 905 and the enhanced modulation layer 910 are the eNB 105-d and UE 115-g and UE 115-h. Can be transmitted simultaneously. In this example, the base modulation layer 905 may include first content including unicast data transmitted to the first UE 115-g, the enhancement modulation layer 910 is superimposed on the base modulation layer 905, and the second Second content including unicast data for the UE 115-h.

  [0151] In a scheme, such as the scheme described above with respect to FIGS. 3-6, the base modulation layer 905 and the enhanced modulation layer 910 are a single communication between the eNB 105-d and the UE 115-g and UE 115-h. May be transmitted on the link. In this example, the first UE 115-g may have relatively bad channel conditions that do not allow the UE 115-g to decode the enhanced modulation layer 910. Thus, eNB 105-d may use, for example, a downlink grant indicating that unicast downlink content is provided to UE 115-g using basic modulation layer 905, and UE 115-g using basic modulation layer 905. Can be provided. The UE 115-g may simply decode the base modulation layer 905 and may not perform enhancement modulation layer decoding or interference cancellation to remove the base modulation layer 905 from the received transmission. In an example, UE 115-g may perform HARQ techniques on the received unicast data and send ACK / NACK that unicast data has been received.

  [0152] In this example, the second UE 115-h may have relatively good channel conditions that allow the UE 115-h to receive and decode the enhanced modulation layer 910. Thus, eNB 105-d may schedule UE 115-h to receive downlink content using enhanced modulation layer 910, which removes interference from basic modulation layer 905 and enhances modulation. In order to decode layer 910, an interference cancellation technique may be performed on the received transmission. Thus, through the use of hierarchical modulation techniques, multiple data streams may be transmitted simultaneously to different UEs 115-g and 115-h, thereby improving utilization of the wireless communication system 900.

  [0153] In some examples, the eNB 105-d may be scheduled such that the first UE 115-g receives unicast data via the base modulation layer 905 and the second UE 115-h is augmented. Signaling indicating that unicast data is scheduled to be received via modulation layer 910 may be provided to UEs 115-g and 115-h. In some examples, unicast data provided to each of UEs 115-g and 115-h may be transmitted using a PDSCH transmitted on the respective base modulation layer 905 or enhancement modulation layer 910. In some examples, UEs 115-g and 115-h may perform HARQ techniques on the received unicast data and send ACK / NACK that unicast data has been received.

  [0154] Referring now to FIG. 10, a block diagram 1000 illustrates a device 405-a for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, device 405-a may include one or more of the base station or eNB 105 and / or device 405 described with respect to FIGS. 1, 2, 4, 7, 8, and / or FIG. This may be an example of this embodiment. The device 405-a may be a processor. Device 405-a may include a receiver module 410-a, an eNB hierarchical modulation module 420-a, and / or a transmitter module 430-a. Each of these components may be in communication with each other.

  [0155] The components of device 405-a may be implemented individually or collectively by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASICs, FPGAs, and other semi-custom ICs) that can be programmed in any manner known in the art can be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0156] In some examples, the receiver module 410-a may be an example of the receiver module 410 of FIG. Receiver module 410-a may be or include an RF receiver, such as an RF receiver, operable to receive transmissions on two or more hierarchical modulation layers. In some examples, transmitter module 430-a may be an example of transmitter module 430 of FIG. The transmitter module 430-a may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. The RF transmitter 430-a may in some examples include a single transmitter, or may include a single transmitter per transmit / receive chain. The transmitter module 430-a may include one or more of the wireless communication systems 100, 200, 700, 800, and / or 900 described with respect to FIGS. 1, 2, 7, 8, and / or 9. Used to transmit various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as communication link 125 Can be done.

  [0157] The eNB hierarchical modulation module 420-a may be an example of the eNB hierarchical modulation module 420 described with respect to FIG. 4 and may be a base / enhancement modulation layer content determination module. 1055, a content modulation module 1060, a parameter determination module 1060, and a superpositioning module 1070. Each of these components can communicate with each other.

  [0158] In some examples, the base / enhanced modulation layer content determination module 1055 is transmitted from the device 405-a using the base modulation layer, eg, as described above with respect to FIGS. The content to be determined and the content to be transmitted from device 405-a using the enhanced modulation layer can be determined. The content modulation module 1060 may modulate the determined content on the appropriate base modulation layer or enhancement modulation layer. The parameter determination module 1065 can determine various parameters related to channel conditions, such as the transmission energy ratio of the base modulation layer and the enhanced modulation layer, and one or more of the parameters to be used in hierarchical modulation.

  [0159] In some examples, the parameter determination module 1065 determines channel quality associated with the UE based on channel state information (CSI) received from the UE, and the channel condition of the UE is hierarchical. Whether to support dynamic modulation can be determined. If the channel condition supports hierarchical modulation, the parameter determination module 1065 may calculate a transmission energy ratio between the base modulation layer and the enhanced modulation layer based on the CSI. In some examples, the parameter determination module 1065 can determine parameters for each of a plurality of transmission time intervals (TTIs). In some examples, the parameter determination module 1065 can also determine the number of spatial layers available for each transmission of the base modulation layer and the enhanced modulation layer, which can include, for example, CSI and rank associated with the UE. It can be determined based on the indicator (RI).

  [0160] In some examples, the parameter determination module determines CSI for several UEs, and based on the CSI for each of the UEs, which UE is one of the basic modulation layer or the enhanced modulation layer Or it can instruct whether to receive a plurality. For example, one or more UEs determined to have a lower channel quality based on the determined CSI can receive the base modulation layer and have a higher channel quality based on the determined CSI. The determined UE or UEs may then receive the enhancement modulation layer or both the base modulation layer and the enhancement modulation layer depending on the content to be transmitted to the UE. The superposition module 1070 can superimpose the enhancement modulation layer on the base modulation layer according to the parameters determined by the parameter determination module 1065 for transmission by the transmitter module 430-a.

  [0161] Referring now to FIG. 11, a flowchart conceptually illustrating an example method for wireless communication in accordance with an aspect of the present disclosure is described. For clarity, the method 1100 may be related to one of the base stations or eNBs 105 and / or devices 405 described with respect to FIGS. 1, 2, 4, 7, 7, 8, and / or 10. This will be described below. In one example, an eNB or device may execute one or more sets of codes for controlling functional elements of the eNB or device to perform the functions described below.

  [0162] At block 1105, the eNB may determine CSI for the UE to receive the transmission. As mentioned above, CSI may be provided by the UE, information on channel conditions at the UE, such as a rank indicator (RI) indicating the number of spatial layers that the UE may transmit / receive, and other information on the UE Information may be included. At block 1110, the eNB may determine a UE with a channel condition that supports reception of an enhanced modulation layer. At block 1115, the eNB may determine parameters for the enhanced modulation layer, such as energy ratio, transport block size, modulation and coding scheme. The parameters for the enhanced modulation layer may be determined based on, for example, CSI for the UE, RI for the UE, and data to be transmitted.

  [0163] At block 1120, the eNB may send signaling information to the UE in the downlink grant. The signaling information includes, for example, a downlink grant that includes an indication of whether the UE should receive a basic modulation layer, an enhanced modulation layer, or both, and downlink resources for the UE on the layer Can be included. The signaling information may also be, for example, a transmission energy ratio between the base modulation layer and the enhancement modulation layer, a transport block size for the base modulation layer and the enhancement modulation layer, or a modulation and coding for the base modulation layer and the enhancement modulation layer. One or more of the following schemes may be included. In some examples, the downlink grant is a resource block location of data transmitted to the UE over one or more of the base modulation layer or enhancement modulation layer, one or more of the base modulation layer or enhancement modulation layer. Modulation and coding scheme (MCS) of data sent to the UE above, precoding matrix used for transmission on one or more of the basic modulation layer or enhancement modulation layer, basic modulation layer or enhancement modulation Layer mapping for one or more of the layers, code block size for one or more of the basic modulation layer or enhancement modulation layer, or spatial layer for one or more of the basic modulation layer or enhancement modulation layer May include one or a combination of any number.

  [0164] The signaling information is provided in a single downlink grant comprising information for each of the base modulation layer and the enhanced modulation layer, which in some examples is provided to each UE that is to receive downlink resources. Can be done. In some examples, the downlink grant may include information for one of the hierarchical modulation layers, such as through one or more bits embedded in the downlink grant, where the grant is a basic modulation. An indication of being for a layer or enhancement modulation layer may also be included. In some examples, a base modulation layer or enhancement modulation layer indication indicates a cell radio network temporary identifier (for UE) (indicating that the downlink resource is for the base modulation layer or enhancement modulation layer). Cyclic Redundancy Check (CRC) masked by C-RNTI). For example, the C-RNTI for the base modulation layer may include a primary cell (PCell) RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer may be secondary for the UE. SCell RNTI (SC-RNTI).

  [0165] In other examples, all of the signaling information may include, for example, an energy ratio between the basic modulation layer and the enhancement modulation layer, a modulation scheme for the basic modulation layer, a modulation scheme for the enhancement modulation layer, and a basic modulation. It may be provided using radio resource control (RRC) signaling, which may include a resource block size for a layer, or a resource block size for an enhanced modulation layer. In such an example, the parameters provided in RRC signaling may be configured semi-statically and the downlink grant may be based on such semi-statically configured parameters. In some examples, the signaling information is provided using a physical control format indicator channel (PCFICH).

  [0166] Continuing to refer to FIG. 11, at block 1125, the eNB may modulate content onto the base modulation layer. The base modulation layer content may be modulated on the base modulation layer according to parameters associated with the base modulation layer and the enhancement modulation layer. At block 1130, the eNB may modulate the content onto the enhanced modulation layer in a similar manner. At block 1135, the eNB may transmit a base modulation layer and an enhanced modulation layer. Such transmission may include superimposing the enhancement modulation layer on the base modulation layer and transmitting the modulation layer to one or more UEs.

  [0167] Referring now to FIG. 12, illustrated is a flowchart that conceptually illustrates an example method for wireless communication in accordance with an aspect of the present disclosure. For clarity, the method 1200 is related to one of the base stations or eNBs 105 and / or devices 405 described with respect to FIG. 1, FIG. 2, FIG. This will be described below. In one example, an eNB or device may execute one or more sets of codes for controlling functional elements of the eNB or device to perform the functions described below.

  [0168] At block 1205, the eNB may determine parameters for the enhanced modulation layer, such as energy ratio, transport block size, modulation and coding scheme. As discussed above, in some examples, separate downlink grants may be provided for each of the base modulation layer and the enhanced modulation layer. For example, some UEs can receive content on the base modulation layer and other UEs can receive content on the enhanced modulation layer, in which case there is a separate grant for each modulation layer. Can be provided. At block 1210, the eNB may send base modulation layer control information to one or more UEs in a base layer downlink grant. At block 1215, the eNB may transmit the enhancement modulation layer control information in the enhancement layer downlink grant to the UE that should receive the enhancement layer. Each of these downlink grants may include information such as the information described above with respect to modulation layer parameters.

  [0169] Referring now to FIG. 13, a block diagram 1300 illustrates a device 1305 for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, device 1305 may be an example of one or more aspects of a UE described with respect to FIGS. 1, 2, 6, 6, 7, 8, and / or 9. Device 1305 can also be a processor. Device 1305 may include a receiver module 1310, a UE interference mitigation module 1320, a UE hierarchical modulation module 1325, and / or a transmitter module 1330. Each of these components can communicate with each other.

  [0170] The components of device 1305 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0171] In some examples, the receiver module 1310 may be or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. In some examples, transmitter module 1330 may be or include an RF transmitter, such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. . RF transmitter 1330 may include a single transmitter in some examples, or may include a single transmitter per transmit / receive chain. The transmitter module 1330 may include one or more communication links of the wireless communication systems 100, 200, 700, 800, and / or 900 described with respect to FIGS. 1, 2, 7, 8, and / or FIG. May be used to transmit various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as 125 .

  [0172] In some examples, UE interference reduction module 1320 may perform interference reduction on signals received at receiver module 1310. For example, interference reduction module 1320 performs an interference cancellation technique on the received signal, for example, to provide an enhancement layer that can be decoded from the received signal with the interference associated with the base modulation layer being decoded. be able to. The UE interference reduction module 1320 may also perform other intra-cell, inter-cell, and / or inter-radio interference cancellation techniques, as described below for the various examples of FIGS. UE hierarchical modulation module 1325 decodes multiple hierarchical modulation layers and / or configures multiple hierarchical modulation layers to support transmission on more than one hierarchical modulation layer The content to be transmitted on each hierarchical modulation layer for device 1305 when operating in the system can be determined.

  [0173] The UE hierarchical modulation module 1325 performs an interference cancellation technique on the received signal, for example, to decode the base modulation layer and cancel the interference from the base modulation layer, and decode the enhancement modulation layer As such, device 1305 can be configured. The UE hierarchical modulation module 1325 may also determine parameters associated with one or more modulation layers to assist modulation layer interference cancellation and decoding. In some examples, there may be more than one enhancement modulation layer, in which case UE hierarchical modulation module 1325 may perform successive interference cancellation and decoding of each successive modulation layer. Can be managed.

  [0174] Referring now to FIG. 14, illustrated is a flowchart that conceptually illustrates an example method for wireless communication in accordance with an aspect of the present disclosure. For clarity, method 1400 is described below with respect to one of UE 115 and / or device 1305 described with respect to FIGS. Is done. In one example, the UE may execute one or more sets of codes for controlling functional elements of the UE to perform the functions described below.

  [0175] In block 1405, the UE may be able to receive a downlink grant from the base station. For example, the UE may receive a downlink grant from the eNB indicating that downlink resources are allocated for the base modulation layer and / or the enhancement modulation layer, and the downlink grant is illustrated in FIGS. May include information such as the information discussed above. In block 1410, the UE may determine the transmission characteristics of the base modulation layer and the transmission characteristics of the enhanced modulation layer. Such characteristics may be determined based on signaling information included in the downlink grant and / or received RRC signaling including parameters associated with a hierarchical modulation layer, such as those discussed above. May be determined based on In block 1415, the UE may decode the content from the base modulation layer.

  [0176] At block 1420, the UE may perform an interference cancellation technique on the received signal to reduce interference in the signal from the base modulation layer. Interference cancellation may be based on, for example, basic modulation layer transmission characteristics and enhanced modulation layer characteristics provided in control signaling in the downlink grant or provided through RRC signaling. The control signaling may include, for example, basic modulation layer signal characteristics for use in performing interference reduction. In some examples, control signaling may be provided at the base modulation layer. Interference cancellation techniques are one or more established, such as, for example, linear minimum mean square error (MMSE) suppression, QR decomposition based spherical decoding (QR-SD), and / or continuous interference cancellation (SIC). Interference cancellation techniques. In block 1425, the UE decodes the content from the enhanced modulation layer. Such content may include content determined to be transmitted using an enhanced modulation layer, such as, for example, low priority data or data having a lower transmission data error rate threshold. In some examples, the UE may perform HARQ routines on the decoded enhancement layer content and send an ACK / NACK that the transmission has been received, as shown in optional block 1430. .

  [0177] Referring now to FIG. 15, a block diagram 1500 illustrates a device 1305-a for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, device 1305-a may include one or more aspects of UE 115 or device 1305 described with respect to FIGS. 1, 2, 6, 7, 8, 9, and / or 13. Can be an example. The device 1305-a may be a processor. Device 1305-a may include a receiver module 1310-a, a UE interference reduction module 1320-a, a UE hierarchical modulation module 1325-a, and / or a transmitter module 1330-a. Each of these components may be in communication with each other.

  [0178] The components of device 1305-a may be implemented individually or collectively by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASICs, FPGAs, and other semi-custom ICs) that can be programmed in any manner known in the art can be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0179] In some examples, the receiver module 1310-a may be an example of the receiver module 1310 of FIG. Receiver module 1310-a may be or include an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. In some examples, transmitter module 1330-a may be an example of transmitter module 1330 of FIG. The transmitter module 1330-a may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. The RF transmitter 1330-a may in some examples include a single transmitter, or may include a single transmitter per transmit / receive chain. The transmitter module 1330-a may include one or more of the wireless communication systems 100, 200, 700, 800, and / or 900 described with respect to FIGS. 1, 2, 7, 8, and / or 9. Used to transmit various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as communication link 125 Can be done.

  [0180] UE interference reduction module 1320-a may be an example of UE interference reduction module 1320 described with respect to FIG. 13, with parameter determination module 1510 and base modulation layer interference cancellation module 1515. And may include. Each of these components can communicate with each other. The parameter determination module 1510 can determine one or more parameters associated with the base modulation layer and / or the enhancement modulation layer for use in interference cancellation. For example, the parameter determination module 1510 may include an energy ratio between a base modulation layer and an enhancement modulation layer, an MCS for each layer, a resource block of data transmitted to the UE on one or more of the base modulation layer or the enhancement modulation layer Position, precoding matrix used to transmit on one or more of the basic modulation layer or enhancement modulation layer, layer mapping for one or more of the basic modulation layer or enhancement modulation layer, basic modulation layer or One or more of the code block size for one or more of the enhancement modulation layers and / or the number of spatial layers for one or more of the base modulation layer or enhancement modulation layer may be determined. The base modulation layer interference cancellation module 1515 may use the parameters provided by the parameter determination module 1510 to cancel the interference associated with the base modulation layer and provide the resulting signal for enhancement modulation layer decoding. it can. Interference cancellation techniques may include, for example, techniques as discussed above.

  [0181] The UE hierarchical modulation module 1325-a may be an example of the UE hierarchical modulation module 1320 described with respect to FIG. 13 and includes a base / enhancement modulation layer decoding module 1505. May include. Base / enhancement modulation layer decoding module 1505 may operate to decode content modulated on the base modulation layer and the enhancement modulation layer.

  [0182] Referring now to FIG. 16, a block diagram 1600 illustrates a device 1605 for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, the device 1605 may be an example of one or more aspects of the UE 115 described with respect to FIGS. 1, 2, 6, 7, 8, and / or 9. Device 1605 can also be a processor. Device 1605 may include a receiver module 1610, a UE hierarchical modulation module 1620, and / or a transmitter module 1630. Each of these components can communicate with each other.

  [0183] The components of device 1605 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0184] In some examples, the receiver module 1610 may be or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. In some examples, the transmitter module 1630 may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. . The RF transmitter 1630 may include a single transmitter in some examples, or may include a single transmitter per transmit / receive chain. The transmitter module 1630 may include one or more communication links of the wireless communication systems 100, 200, 700, 800, and / or 900 described with respect to FIGS. 1, 2, 7, 8, and / or FIG. May be used to transmit various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as 125 .

  [0185] The UE hierarchical modulation module 1620 configures a plurality of hierarchical modulation layers, each for the device 1605 when operating in a wireless communication system that supports transmission on two or more hierarchical modulation layers. The content to be transmitted on the hierarchical modulation layer can be determined. For example, the UE hierarchical modulation module 1620 may be for transmission on each hierarchical modulation layer, modulation of content on each hierarchical modulation layer, and superposition of hierarchical modulation layers for transmission through the transmission module 1630. The device 1605 can be configured to determine the content of. UE hierarchical modulation module 1620 relates to eNB hierarchical modulation, such as, for example, those described above with respect to FIGS. 1-12 and described below for various examples in FIGS. Hierarchical modulation can be performed in a manner similar to that discussed above.

  [0186] Referring now to FIG. 17, illustrated is a flowchart that conceptually illustrates an example method for wireless communication in accordance with an aspect of the present disclosure. For clarity, method 1700 is described below with respect to one of UE 115 and / or device 1605 described with respect to FIGS. 1, 2, 6, 6, 7, 8, 9, and / or 16. Is done. In one example, the UE may execute one or more sets of codes for controlling functional elements of the UE to perform the functions described below.

  [0187] At block 1705, the UE may receive one or more uplink grants from the base station. The uplink grant may provide information regarding uplink resources that the UE may use to transmit uplink data to the eNB. In some examples, a single uplink grant may include an indication of hierarchical modulation resources for both the base modulation layer and the enhanced modulation layer. In another example, a separate uplink grant may be received, the first uplink grant indicates a hierarchical modulation resource for the base modulation layer, and the second uplink grant is a hierarchy for the enhancement modulation layer Indicates a dynamic modulation resource. Similar to that discussed above, the base modulation layer may have a lower error rate than the enhancement modulation layer. In some examples, the uplink grant may include an indication that the grant is for a base modulation layer or an enhancement modulation layer, and uplink resources for the indicated base modulation layer or enhancement modulation layer. Such an indication may include, for example, one or more bits embedded in the uplink grant. In another example, the base modulation layer or enhancement modulation layer indication is masked by the C-RNTI for the UE to indicate that the uplink resource is for the base modulation layer or the enhancement modulation layer A cyclic redundancy check (CRC) may be included. In some examples, the C-RNTI for the base modulation layer may include a PC-RNTI for the UE, and the C-RNTI for the enhanced modulation layer includes an SC-RNTI for the UE. Good.

  [0188] At block 1710, the UE may determine the transmission characteristics of the base modulation layer and the transmission characteristics of the enhancement modulation layer. This determination may be based on information from the uplink grant, for example, in the energy ratio between the base modulation layer and the enhancement modulation layer, layer mapping information, code block size, or each of the base modulation layer and the enhancement modulation layer. May include one or more determinations of the number of spatial layers. In some examples, the uplink grant may indicate the number of spatial layers for each transmission of the base modulation layer and the enhanced modulation layer. In other examples, one or more of the characteristics can be, for example, a transmission energy ratio between a base modulation layer and an enhancement modulation layer, a transport block size for the base modulation layer and the enhancement modulation layer, or a base modulation layer and an enhancement. It may be determined based on received signaling information received via RRC signaling, which may include parameters such as one or more of the modulation and coding schemes for the modulation layer. In other examples, one or more of the parameters may be provided in the uplink grant, and others of the parameters are provided through RRC signaling. In some examples, signaling information may be received on the PCFICH and may include independent control information for each of the base modulation layer and the enhancement modulation layer.

  [0189] In block 1715, the UE may determine content to be transmitted in the base modulation layer and the enhanced modulation layer. Similar to that discussed above, the content may include first content to be transmitted at the base modulation layer and second content to be transmitted at the enhancement modulation layer. Different content, in various examples, is based on error rate thresholds associated with different content, high or low priority content, QoS parameters associated with the content, and / or sensitivity to content latency. Can be determined. In some examples, the base modulation layer may include a physical uplink control channel (PUCCH) and the enhancement modulation layer may include a physical uplink shared channel (PUSCH). In other examples, both the base modulation layer and the enhanced modulation layer may include PUSCH.

  [0190] In some examples, the first content may include control information transmitted on the PUCCH. Such control information may include, for example, one or more of downlink data acknowledgment (eg, HARQ ACK / NACK data), channel state information (CSI), rank indicator (RI), or scheduling request (SR). May be included. In some examples, the control information further includes uplink information associated with the enhanced modulation layer. For example, if the uplink grant indicates that a data rate should be used for uplink transmission on the enhanced modulation layer, the UE supports such data rate based on the UE's transmission power. The UE may provide an indication of different data rates in the uplink information.

  [0191] At block 1720, the UE may encode the content on the base modulation layer. At block 1725, the UE may encode the content on the enhanced modulation layer. The enhancement modulation layer may be superimposed on the base modulation layer, and the UE may transmit the base modulation layer and the enhancement modulation layer as indicated at block 1725. The hierarchical modulation layer may be received at the eNB and decoded in a manner similar to that discussed above and as discussed below with respect to FIGS. 20A, 20B, and 21.

  [0192] As discussed above, the base modulation layer and the enhanced modulation layer may be used to transmit different content based on one or more of several different factors. FIG. 18 shows a wireless communication system 1800 where UE 115-i can communicate with eNB 105-e using hierarchical modulation. The wireless communication system 1800 may represent aspects of the wireless communication system 100, 200, 700, 800, and / or 900 shown in FIGS. 1, 2, 7, 8, and / or 9, for example. In this example, multiple modulation layers may be utilized for wireless communication, in which case base modulation layer 1805 and enhancement modulation layer 1810 may be transmitted simultaneously between UE 115-i and eNB 105-e. Although a single enhancement modulation layer 1810 is shown in FIG. 18, other examples may include more than one enhancement modulation layer. In a manner such as that described above with respect to FIGS. 16-17, the enhanced modulation layer 1810 may be superimposed on the base modulation layer 1805 and in a single communication link between the UE 115-i and the eNB 105-e. May be sent.

  [0193] According to this example, the basic modulation layer 1805 can provide more reliable communication between the UE 115-i and the eNB 105-e, and the eNB 105-e can receive and decode the basic modulation layer 1805. Can result in a relatively high certainty of being able to succeed. In some examples, the eNB 105-e may not send an ACK or NACK that it received a transmission on the base modulation layer, such as according to a HARQ technique. Eliminating such feedback may increase capacity on the base modulation layer as there is less overhead associated with HARQ ACK / NACK transmissions and associated retransmissions. Due to the relatively high reliability of the base modulation layer 1805, content that can benefit from high reliability and reduced latency of the transmission of the base modulation layer 1805 can be selected for transmission on the base modulation layer. For example, as discussed above, the base modulation layer 1805 may communicate high priority content, latency sensitive content, and / or control / signaling information from the UE 115-i to the eNB 105-e. Can be selected.

  [0194] According to various examples, the enhanced modulation layer 1810 may provide less reliable communication between the UE 115-i and the eNB 105-e compared to the base modulation layer 1805. Thus, since eNB 105-e may perform HARQ techniques for enhanced modulation layer 1810 transmissions, transmissions that were successfully received and not decoded can be retransmitted by UE 115-i. According to some examples, the base modulation layer 1805 may have an error rate of about 1%, and the enhanced modulation layer 1810 may have an error rate of about 10%. As mentioned above, in some examples, UE 115-i may identify the first content for transmission on base modulation layer 1805.

  [0195] In some examples, the first content may be associated with a first error rate threshold that defines an error rate in the initial transmission that is requested or desired for the first content. The first error rate threshold may be determined based on, for example, the type of information included in the first content. UE 115-i may also identify second content for transmission on enhanced modulation layer 1810. In some examples, the second content may be associated with a second error rate threshold that is higher than the first error rate threshold. The second error rate threshold may be determined based on, for example, the type of information included in the second content. For example, the first content may include high priority content and the second content may include low priority content.

  [0196] In other examples, base modulation layer 1805 may include a control and / or shared channel (eg, PUCCH / PUSCH), and enhanced modulation layer 1810 may include a shared channel (eg, PUSCH). In some examples, the first content may include control information that may be used by UE 115-i for communication with eNB 105-e. For example, the control information may include scheduling request information, acknowledgment information, and / or signaling information, and the control information may be transmitted on the base modulation layer 1805 using PUCCH. The second content may include user data that may be transmitted using the PUSCH on the enhanced modulation layer 1810, for example.

  [0197] Referring now to FIG. 19, a block diagram 1900 illustrates a device 1605-a for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, the device 1605-a may include the UE 115 described with respect to FIGS. 1, 2, 6, 7, 7, 8, 9, 13, 15, 16, and / or FIG. There may be examples of one or more aspects of the devices 1305, 1605. Device 1605 can also be a processor. Device 1605 may include a receiver module 1610-a, a UE hierarchical modulation module 1620-a, and / or a transmitter module 1630-a. Each of these components may be in communication with each other.

  [0198] The components of device 1605-a may be implemented individually or collectively by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0199] In some examples, the receiver module 1610-a may be an example of the receiver module 1610 of FIG. Receiver module 1610-a may be or include an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. In some examples, transmitter module 1630-a may be an example of transmitter module 1630 of FIG. The transmitter module 1630-a may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. The RF transmitter 1630-a may in some examples include a single transmitter, or may include a single transmitter per transmit / receive chain. Transmitter module 1630-a may be used in wireless communication systems 100, 200, 700, 800, 900, and / or 1800 described with respect to FIGS. 1, 2, 7, 8, 9, and / or 18. Various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as one or more communication links 125. Can be used to transmit.

  [0200] The UE hierarchical modulation module 1620-a may be an example of the UE hierarchical modulation module 1620 described with respect to FIG. A determination module 1915 and a superposition module 1920 may be included. Each of these components can communicate with each other.

  [0201] In some examples, the base / enhanced modulation layer content determination module 1905 is transmitted from the device 1605-a using the base modulation layer, eg, as described above with respect to FIGS. The content to be transmitted and the content to be transmitted from device 1605-a can be determined using the enhancement modulation layer. The content modulation module 1910 can modulate the determined content on an appropriate base modulation layer or enhancement modulation layer. The parameter determination module 1915 can determine various parameters related to channel conditions, such as the transmission energy ratio of the base modulation layer and the enhanced modulation layer, and one or more of the parameters to be used in hierarchical modulation.

  [0202] In some examples, the parameter determination module 1915 may determine CSI and provide CSI information to the eNB to determine whether the channel conditions support hierarchical modulation. In some examples, the parameter determination module 1915 can determine parameters for each of a plurality of transmission time intervals (TTIs). In some examples, the parameter determination module 1965 can also determine the number of spatial layers available for each transmission of the base modulation layer and the enhanced modulation layer, which is reported to the eNB in a rank indicator, for example. obtain. The parameter determination module 1915 can also determine a parameter associated with the hierarchical modulation layer based on control signaling including one or more parameters for hierarchical modulation layer transmission. Such received parameters may include, for example, energy ratio between layers, layer mapping information, code block size, number of spatial layers in each of the base and enhancement modulation layers, or MCS for each modulation layer One or more of. The superposition module 1920 can superimpose the enhancement modulation layer on the base modulation layer according to the parameters determined by the parameter determination module 1915 for transmission by the transmitter module 1630-a.

  [0203] Referring now to FIG. 20A, a block diagram 2000 illustrates a device 2005 for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, device 2005 is one of eNB 105 or device 405 described with respect to FIGS. 1, 2, 4, 6, 6, 7, 8, 9, 10, and / or 18. Or it may be an example of several aspects. Device 2005 can also be a processor. Device 2005 may include a receiver module 2010, an eNB interference reduction module 2020, an eNB hierarchical modulation module 2025, and / or a transmitter module 2030. Each of these components can communicate with each other.

  [0204] The components of the device 2005 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0205] In some examples, the receiver module 2010 may be or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. In some examples, the transmitter module 2030 may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. . The RF transmitter 2030 may include a single transmitter in some examples, or may include a single transmitter per transmit / receive chain. The transmitter module 2030 may be one of the wireless communication systems 100, 200, 700, 800, 900, and / or 1800 described with respect to FIGS. 1, 2, 7, 8, 9, and / or 18. Or transmit various types of data and / or control signals (ie, transmissions) over one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as multiple communication links 125 Can be used to

  [0206] In some examples, the eNB interference reduction module 2020 may perform interference reduction on signals received at the receiver module 2010. For example, the interference reduction module 2020 performs interference cancellation techniques on the received signal, eg, to cancel the interference associated with the base modulation layer from the received signal and provide an enhancement layer that can be decoded. be able to. The eNB interference reduction module 2020 may also perform other intra-cell, inter-cell, and / or inter-radio interference cancellation techniques, as described below for the various examples of FIGS. The UE hierarchical modulation module 2025 decodes multiple hierarchical modulation layers and / or configures multiple hierarchical modulation layers to support transmission on more than one hierarchical modulation layer The content to be transmitted on each hierarchical modulation layer for device 2005 when operating in the system can be determined.

  [0207] The eNB hierarchical modulation module 2025, for example, decodes the base modulation layer, performs an interference cancellation technique on the received signal to cancel interference from the base modulation layer, and decodes the enhancement modulation layer Thus, the device 2005 can be configured. The eNB hierarchical modulation module 2025 may also determine parameters associated with one or more modulation layers to assist modulation layer interference cancellation and decoding. In some examples, there may be more than one enhancement modulation layer, in which case the eNB hierarchical modulation module 2025 manages the execution of successive interference cancellation and decoding of each successive modulation layer be able to.

  [0208] Referring now to FIG. 20B, a block diagram 2050 illustrates a device 2005-a for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, the device 2005-a may be the eNB 105 described with respect to FIGS. 1, 2, 4, 6, 6, 7, 8, 9, 10, 18, and / or FIG. It may be an example of one or more aspects of devices 405, 2005. The device 2005-a can also be a processor. The device 2005-a may include a receiver module 2010-a, an eNB interference reduction module 2020-a, an eNB hierarchical modulation module 2025-a, and / or a transmitter module 2030-a. Each of these components may be in communication with each other.

  [0209] The components of device 2005-a may be implemented individually or collectively by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0210] In some examples, the receiver module 2010-a may be an example of the receiver module 2010 of FIG. 20A. The receiver module 2010-a may be or include an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. In some examples, transmitter module 2030-a may be an example of transmitter module 2030 in FIG. 20A. The transmitter module 2030-a may be or include an RF transmitter such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. The RF transmitter 2030-a may in some examples include a single transmitter, or may include a single transmitter per transmit / receive chain. The transmitter module 2030-a may be of the wireless communication system 100, 200, 700, 800, 900, and / or 1800 described with respect to FIGS. 1, 2, 7, 8, 9, and / or 18. Various types of data and / or control signals (ie, transmissions) are transmitted through one or more communication links of a wireless communication system that includes two or more hierarchical modulation layers, such as one or more communication links 125. Can be used to transmit.

  [0211] The eNB interference reduction module 2020-a may be an example of the eNB interference reduction module 2020 described with respect to FIG. 20A and may include a parameter determination module 2060 and a base modulation layer interference cancellation module 2065. Each of these components can communicate with each other. The parameter determination module 2060 may determine one or more parameters associated with the base modulation layer and / or the enhancement modulation layer for use in interference cancellation. For example, the parameter determination module 2060 may comprise a resource block of data transmitted by the UE on one or more of the base modulation layer and enhancement modulation layer energy ratio, each MCS, basic modulation layer or enhancement modulation layer of the layer. Position, precoding matrix used to transmit on one or more of the basic modulation layer or enhancement modulation layer, layer mapping for one or more of the basic modulation layer or enhancement modulation layer, basic modulation layer or One or more of the code block size for one or more of the enhancement modulation layers and / or the number of spatial layers for one or more of the base modulation layer or enhancement modulation layer may be determined. The base modulation layer interference cancellation module 2065 uses one or more parameters provided by the parameter determination module 2060 to cancel the interference associated with the base modulation layer and uses the resulting signal for decoding of the enhanced modulation layer. Can be provided. Interference cancellation techniques according to various examples may include techniques as discussed above (eg, linear MMSE suppression, QR-SD, SIC, etc.).

  [0212] The eNB hierarchical modulation module 2025-a may be an example of the eNB hierarchical modulation module 2025 described with respect to FIG. 20A and may include a base / enhanced modulation layer decoding module 2055. Base / enhancement modulation layer decoding module 2055 may operate to decode content modulated on the base modulation layer and the enhancement modulation layer.

  [0213] Referring now to FIG. 21, a flowchart conceptually illustrating an example method for wireless communication in accordance with an aspect of the present disclosure is described. For clarity, the method 2100 may be performed by an eNB or a base as described with respect to FIGS. 1, 2, 4, 7, 7, 8, 9, 10, 18, 20A, and / or 20B. It will be described below with respect to one of the stations 105 and / or devices 405, 2005. In one example, the eNB may execute one or more sets of codes for controlling the functional elements of the eNB to perform the functions described below.

  [0214] At block 2105, the eNB may determine the channel characteristics of the UE. Such channel characteristics may be determined based on, for example, CSI received from the UE. At block 2110, the eNB may determine the base modulation layer transmission characteristics and the enhanced modulation layer transmission characteristics. Such characteristics may be determined based on the determined channel characteristics for the UE and / or other information associated with the UE (eg, capacity for hierarchical modulation, RI, transmit power, etc.). At block 2115, the eNB may determine uplink grant characteristics for the uplink grant for the UE. Uplink grant characteristics are transmitted by the UE on some examples, the energy ratio between the base modulation layer and the enhancement modulation layer, each MCS of the layer, one or more of the base modulation layer or the enhancement modulation layer A resource block location of data, a precoding matrix used to transmit on one or more of the base modulation layer or enhancement modulation layer, a layer mapping for one or more of the base modulation layer or enhancement modulation layer, Including one or more of a code block size for one or more of the base modulation layer or enhancement modulation layer and / or the number of spatial layers for one or more of the base modulation layer or enhancement modulation layer obtain.

  [0215] At block 2120, the eNB may send one or more uplink grants to the UE. The eNB may be, for example, a single uplink grant that includes an uplink grant for the base modulation layer, a single uplink grant that includes uplink grant information for both the base modulation layer and the enhanced modulation layer, or Separate uplink grants for the base modulation layer and one or more enhancement modulation layers may be transmitted. At block 2125, the eNB may receive the uplink transmission and decode the content from the base modulation layer. At block 2130, the eNB may perform an interference cancellation technique on the received signal to reduce interference in the signal from the base modulation layer. Interference cancellation may be based, for example, on the transmission characteristics of the basic modulation layer and the characteristics of the enhancement modulation layer. Interference cancellation techniques may include one or more established interference cancellation techniques, such as those discussed above. At block 2135, the eNB may decode the content from the enhanced modulation layer. Such content may include content determined to be transmitted using an enhanced modulation layer, such as, for example, low priority data or data having a lower transmission data error rate threshold. In some examples, the eNB may perform a HARQ routine on the decoded enhancement layer content and send an ACK / NACK that the transmission has been received.

  [0216] FIG. 22 illustrates a wireless communication system 2200 having a number of cells (eg, cell I 2205-a, cell II 2205-b, and cell III 2205-c) and an interference cancellation environment in accordance with various aspects of the disclosure. Indicates. The wireless communication system 2200 may represent aspects of the wireless communication system 100 and / or 200 shown in FIGS. 1 and / or 2, for example. In the example of FIG. 22, each of a number of base stations (eg, base stations 105-f, 105-g, 105-h, and 105-i) has a respective coverage area (eg, coverage area 110) of the base station. -B, 110-c, and 110-d) can communicate with several UEs (eg, UE 115-j, 115-k, 115-l, and 115-m). As an example, cell I2205-c is shown as including a first base station 105-f and a second base station 105-g.

  [0217] Under some circumstances or conditions, there may be inter-cell interference between base stations and / or UEs of the wireless communication system 2200. For example, UE 115-k in cell III 2205-c may experience interference 2210 from base station 105-h in cell II 2205-b. By way of example, the interference 2210 can be a base station 105-h reference signal transmission (eg, primary synchronization signal (PSS), secondary synchronization signal (SSS), cell specific reference signal (CRS)). : Cell-specific reference signal (PRS), positioning reference signal (PRS), CSI reference signal (CSI-RS: CSI reference signal), or UE-specific reference signal (UE-RS: UE-specific reference signal) transmission ) Or the transmission of the control channel and data channel of base station 105-h (eg, PBCH, PCFICH, PHICH, PDCCH, ePDCCH, or PDSCH). LTE systems already implement various methods (eg, RS-IC, control-IC, and data-IC) to cancel these types of interference.

  [0218] UE 115-k in cell III 2205-c may additionally or alternatively receive interference 2215 from UE 115-j in cell II 2205-b. As an example, interference 2215 may be the result of enhanced interference management and traffic adaptation (eIMTA), which is the reception of downlink subframes at UE 115-k (eg, base station). During reception of downlink subframes transmitted to UE 115-k by station 105-i) may result in uplink subframe transmission from UE 115-j to base station 105-h.

  [0219] As another example of inter-cell interference at the UE, consider reception of a downlink subframe at UE 115-j in cell II 2205-b. UE 115-k of cell III 2205-c performs device-to-device (D2D) transmission 2220 to another node (eg, to another UE (eg, UE 115-1), to a WLAN access point, etc.) UE 115-j may experience interference 2215 from D2D transmission 2220 when UE 115-j is receiving a downlink subframe from base station 105-h.

  [0220] When cell I2205-a, cell II2205-b, and cell III2205-c are operated by a common operator, neighboring cell base stations 105-f, 105-g, 105-h, and 105-i May communicate with each other over communication links 2225-a, 2225-b, and 2225-c (eg, an X2 backhaul link).

  [0221] FIG. 23 illustrates various TDD uplink-downlink (UL / DL) configurations used for frames of communication in LTE systems (eg, configurations 0, 1, 2, 3, 4, 5, and 6) shows a table 2300. Downlink subframes are indicated by “D” in the figure, uplink subframes are indicated by “U”, and special subframes are indicated by “S”. In some respects, UL / DL configurations can be classified based on the switch-point periodicity from the downlink to the uplink. More specifically, configurations 0, 1, 2, and 6 are characterized by a periodicity of downlink-to-uplink switching points of 5 milliseconds (ms), while configurations 3, 4, and 5 are Characterized by the periodicity of the switching point from the downlink to the uplink of 10 ms.

  [0222] When an operator uses eIMTA, different cells of the operator may use different TDD UL / DL configurations for the same frame of communication. Assuming that the cells operate synchronously, all of the cells are between subframe numbers 0, 1, 2, and 5 of the same type of subframe (eg, D subframe, U subframe, Or S subframe). However, different cells utilizing different TDD UL / DL configurations may communicate different types of subframes during subframe numbers 3, 4, 6, 7, 8, and 9. When different cells communicate different types of subframes during a single subframe number (eg, when one cell is communicating a D subframe while another cell is communicating a U subframe ), The possibility of inter-cell interference may increase.

  [0223] Referring now to FIG. 24, illustrated is a flowchart that conceptually illustrates an example of a method 2400 of wireless communication at a UE according to an aspect of the disclosure. FIG. 24 shows an example of a method for reducing inter-cell interference. For clarity, the method 2400 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115, and / or 115 described with respect to FIG. 1 and / or FIG. In one example, a UE or other device may execute one or more sets of codes for controlling functional elements of the UE or other device to perform the functions described below.

  [0224] In blocks 2405 and / or 2410, the UE may determine transmission characteristic information of signals transmitted from neighboring cells UE. More specifically, at block 2405, the UE may monitor transmissions from neighboring cell UEs. In some cases, the monitored transmission is an uplink transmitted from a neighboring cell UE to a neighboring cell base station according to a TDD UL / DL configuration that is different from the TDD UL / DL configuration used by the serving cell base station for the UE. Subframes can be included. The TDD UL / DL configuration used by the neighboring cell UE includes at least one uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the serving cell base station to the UE. This uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station may interfere with the transmission of the downlink subframe from the serving cell base station to the UE. In other cases, the monitored transmission may include at least one D2D transmission from a neighboring cell UE to another neighboring cell node (eg, to another neighboring cell UE, to a WLAN access point, etc.). At least one D2D transmission from the neighbor cell UE may be transmitted during a downlink subframe transmitted from the serving cell base station to the UE.

  [0225] In block 2410, transmission characteristic information of a signal transmitted from the neighboring cell UE may be determined. In some examples, the transmission characteristic information may include one or more of modulation order, number of spatial layers, or precoding information. In some cases, transmission characteristic information may be determined based on transmissions received while monitoring transmissions from neighboring cell UEs (eg, transmission characteristic information is blindly detected from received transmissions). Can be).

  [0226] In block 2415, interference reduction (eg, interference cancellation) may be performed on signals received at the UE from the serving cell base station. Interference reduction may be performed based on the determined transmission characteristic information.

  [0227] FIG. 25 is a block diagram conceptually illustrating a device 2505, such as a UE, for use in wireless communications, in accordance with aspects of the present disclosure. Device 2505 may be used for inter-cell interference reduction according to various examples. In some examples, device 2505 may be an example of one or more aspects of UE 115 described with respect to FIG. 1 and / or FIG. Device 2505 can also be a processor. Device 2505 may include a receiver module 2510, a UE interference reduction module 2520, and / or a transmitter module 2530. Each of these components can communicate with each other.

  [0228] The components of device 2505 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0229] In some examples, the receiver module 2510 may be or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. Receiver module 2510 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to receive various types of data and / or control signals (ie, transmissions).

  [0230] In some examples, the transmitter module 2530 is operable to transmit on two or more hierarchical modulation layers (eg, through a base modulation layer and one or more enhanced modulation layers). It may be or include an RF transmitter, such as a transmitter. Transmitter module 2530 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to transmit various types of data and / or control signals (ie, transmissions).

  [0231] In some examples, the UE interference reduction module 2520 may include a neighbor cell information determination module 2535 and / or an interference reduction module 2540.

  [0232] In some examples, the neighbor cell information determination module 2535 may be used to determine transmission characteristic information of a signal transmitted from the neighbor cell UE. In some cases, signals transmitted from neighboring cell UEs may be transmitted from neighboring cell UEs to neighboring cell base stations according to a TDD UL / DL configuration that is different from the TDD UL / DL configuration used by the serving cell base station for device 2505. It may include uplink subframes to be transmitted. The TDD UL / DL configuration used by the neighbor cell UE is at least one uplink subframe transmitted from the neighbor cell UE to the neighbor cell base station during a downlink subframe transmitted from the serving cell base station to the device 2505. This uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station may interfere with the transmission of the downlink subframe from the serving cell base station to the device 2505. In other cases, the signal transmitted from the neighboring cell UE includes at least one D2D transmission from the neighboring cell UE to another neighboring cell node (eg, to another neighboring cell UE, to a WLAN access point, etc.). obtain. At least one D2D transmission from the neighbor cell UE may be transmitted during a downlink subframe transmitted from the serving cell base station to the device 2505.

  [0233] In some examples, the transmission characteristic information determined by the neighboring cell information determination module 2535 may include one or more of modulation order, number of spatial layers, or precoding information.

  [0234] In some examples, the neighboring cell information determination module 2535 monitors transmissions from neighboring cell UEs and from neighboring cell UEs based on transmissions received while monitoring transmissions from neighboring cell UEs. Transmission characteristic information of the transmitted signal can be determined.

  [0235] In some examples, the neighboring cell information determination module 2535 is received while monitoring transmissions from neighboring cell base stations (eg, eNB base stations) and monitoring transmissions from neighboring cell base stations. Transmission characteristic information of a signal transmitted from the neighboring cell UE can be determined based on the transmission. In some cases, monitoring may include monitoring PDCCH of neighboring cell base stations. In some cases, monitoring the PDCCH of the neighboring cell base station may include decoding uplink grant information (eg, uplink grant) for the neighboring cell UE and transmitted from the neighboring cell UE. Signal transmission characteristic information may be determined based on uplink grant information for uplink transmissions from neighboring cell UEs, where uplink grant information is monitored while monitoring transmissions from neighboring cell base stations. Received.

  [0236] In some examples, the neighbor cell information determination module 2535 may receive transmission characteristic information of signals transmitted from the neighbor cell UE from the serving cell base station for the device 2505. As described in more detail with respect to FIGS. 27 and / or 29, the serving cell base station may receive transmission characteristic information from a central scheduler that is in communication with both the serving cell base station and neighboring cell base stations.

  [0237] In some examples, interference reduction module 2540 may be used to perform interference reduction (eg, interference cancellation) on a signal received at device 2505 from a serving cell base station. Interference reduction may be performed based on the determined transmission characteristic information.

  [0238] Referring now to FIG. 26, illustrated is a flowchart that conceptually illustrates an example of a method 2600 for wireless communication at a UE according to an aspect of the disclosure. FIG. 26 shows an example method for inter-cell interference reduction in a wireless communication system. For clarity, the method 2600 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115 described with respect to FIG. 1 and / or FIG. In one example, a UE or other device may execute one or more sets of codes for controlling functional elements of the UE or other device to perform the functions described below.

  [0239] In blocks 2605 and / or 2610, the UE may determine transmission characteristic information of signals transmitted from neighboring cells UE. More specifically, at block 2605, the UE may monitor transmissions from neighboring cell base stations (eg, eNB base stations). In some cases, monitoring may include monitoring PDCCH of neighboring cell base stations. In some cases, monitoring PDCCH of neighboring cell base stations may include decoding uplink grant information (eg, uplink grant) for neighboring cell UEs.

  [0240] In block 2610, transmission characteristic information of signals transmitted from neighboring cells UE may be determined. In some examples, the transmission characteristic information may include one or more of modulation order, number of spatial layers, or precoding information. In some cases, the transmission characteristics information is based on transmissions received while monitoring transmissions from neighboring cell base stations (eg, based on uplink grant information for uplink transmissions from neighboring cell UEs). , Where uplink grant information can be determined (received while monitoring transmissions from neighboring cell base stations).

  [0241] The signal transmitted from the neighboring cell UE, for which transmission characteristic information is determined, is different from the TDD UL / DL configuration used by the serving cell base station for the UE, for example. According to the above, may include an uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station. For example, the TDD UL / DL configuration used by the neighboring cell UE may be at least one uplink sub-frame transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the serving cell base station to the UE. This uplink subframe that may include a frame and is transmitted from the neighboring cell UE to the neighboring cell base station may interfere with the transmission of the downlink subframe from the serving cell base station to the UE. The signal transmitted from the neighboring cell UE may additionally or alternatively at least one D2D transmission from the neighboring cell UE to another neighboring cell node (eg, to another neighboring cell UE, to a WLAN access point, etc.) Can be included. In some examples, at least one D2D transmission from a neighboring cell UE may be transmitted during a downlink subframe transmitted from the serving cell base station to the UE.

  [0242] At block 2615, interference reduction (eg, interference cancellation) may be performed on signals received at the UE from the serving cell base station. Interference reduction may be performed based on the determined transmission characteristic information.

  [0243] FIG. 27 illustrates a wireless communication system 2700 having several cells (eg, cell I 2705-a and cell II 2705-b) and an interference cancellation environment in accordance with various aspects of the present disclosure. The wireless communication system 2700 may represent, for example, aspects of the wireless communication system 100 and / or 200 shown in FIG. 1 and / or FIG. In the example of FIG. 27, each of several base stations (eg, base stations 105-j and 105-k) has several UEs (eg, UEs 115-n and 115-k) within their respective coverage areas. o) can communicate.

  [0244] Under some circumstances or conditions, there may be inter-cell interference between base stations and / or UEs of the wireless communication system 2700. For example, UE 115-o in cell II 2705-b may experience interference 2710 from base station 105-j in cell I 2705-a. By way of example, interference 2710 can be a base station 105-j reference signal transmission (eg, PSS, SSS, CRS, PRS, CSI-RS, or UE-RS transmission), or a control channel of base station 105-j and It can be the result of transmission of a data channel (eg, PBCH, PCFICH, PHICH, PDCCH, ePDCCH, or PDSCH). As previously mentioned, LTE systems already implement various methods (eg, RS-IC, Control-IC, and Data-IC) to cancel these types of interference.

  [0245] UE 115-o of cell II 2705-b may additionally or alternatively receive interference 2715 from UE 115-n of cell I 2705-a. As an example, interference 2715 may be the result of eIMTA, which is the reception of downlink subframes at UE 115-o (eg, of downlink subframes transmitted by base station 105-k to UE 115-o). During reception) may result in uplink subframe transmission from UE 115-n to base station 105-j.

  [0246] When cell I 2705-a and cell II 2705-b are operated by a common operator, the cell base stations 105-j and 105-k may perform X2 backhaul as described with respect to FIG. 1 and / or FIG. They can communicate with each other through a communication link, such as one of the links. In some embodiments, the X2 backhaul link between the base stations 105-j and 105-k can be used by base stations 105-j and 105-k to reduce interference 2710 and 2715 (eg, , Transmission characteristic information). In some cases, the shared information may include uplink grant information. Uplink grant information is available for cells in a cell while another cell's base station (eg, base station 105-j of cell I 2705-a) is receiving an uplink subframe from a UE (eg, UE 115-n). May be used to determine when a base station (eg, base station 105-k in cell II 2705-b) is transmitting a downlink subframe to a UE (eg, UE 115-o) Simultaneous transmissions can cause inter-cell interference. In other embodiments, the central scheduler 2720 with which the base stations 105-j and 105-k are communicating can share the transmission characteristic information of one of the base stations with the other of the base stations.

  [0247] Referring now to FIG. 28, illustrated is a flowchart that conceptually illustrates an example method for wireless communication 2800 at a UE, in accordance with aspects of the present disclosure. FIG. 28 shows another example of a method for reducing inter-cell interference in a wireless communication system. For clarity, the method 2800 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115 described with respect to FIG. 1 and / or FIG. In one example, a UE or other device may execute one or more sets of codes for controlling functional elements of the UE or other device to perform the functions described below.

  [0248] In block 2805, the UE may determine transmission characteristic information of a signal transmitted from the neighboring cell UE. In some examples, transmission characteristic information may be determined by receiving transmission characteristic information from a serving cell base station for a UE. In some examples, the transmission characteristic information may include one or more of modulation order, number of spatial layers, or precoding information.

  [0249] The signal transmitted from the neighboring cell UE, for which transmission characteristic information is determined, is different from the TDD UL / DL configuration used by the serving cell base station for the UE, for example. According to the above, may include an uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station. For example, the TDD UL / DL configuration used by the neighboring cell UE may be at least one uplink sub-frame transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the serving cell base station to the UE. This uplink subframe that may include a frame and is transmitted from the neighboring cell UE to the neighboring cell base station may interfere with the transmission of the downlink subframe from the serving cell base station to the UE. The signal transmitted from the neighboring cell UE may additionally or alternatively at least one D2D transmission from the neighboring cell UE to another neighboring cell node (eg, to another neighboring cell UE, to a WLAN access point, etc.) Can be included. In some examples, at least one D2D transmission from a neighboring cell UE may be transmitted during a downlink subframe transmitted from the serving cell base station to the UE.

  [0250] At block 2810, interference reduction (eg, interference cancellation) may be performed on a signal received at the UE from a serving cell base station. Interference reduction may be performed based on the determined transmission characteristic information.

  [0251] Referring now to FIG. 29, illustrated is a flowchart that conceptually illustrates an example of a method 2900 for wireless communication at a UE, in accordance with various aspects of the present disclosure. FIG. 29 shows another example of a method for reducing inter-cell interference in a wireless communication system. For clarity, the method 2900 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115 described with respect to FIG. 1 and / or FIG. In one example, a base station, eNB, or other device has one or more sets of codes for controlling functional elements of the base station, eNB, or other device to perform the functions described below. Can be performed.

  [0252] In block 2905, the serving cell base station may receive transmission characteristic information of a signal transmitted from the neighboring cell UE. Transmission characteristic information may be received, for example, over an X2 backhaul link with neighboring cell base stations and / or from a central scheduler in communication with both the serving cell base station and the neighboring cell base station.

  [0253] The signal transmitted from the neighboring cell UE, for which transmission characteristic information is determined, is different from the TDD UL / DL configuration used by the serving cell base station for the UE, for example. According to the above, may include an uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station. For example, the TDD UL / DL configuration used by the neighboring cell UE is transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the serving cell base station to the UE associated with the serving cell base station. This uplink subframe, which may include at least one uplink subframe and is transmitted from the neighboring cell UE to the neighboring cell base station, may interfere with transmission of the downlink subframe from the serving cell base station to the UE. The signal transmitted from the neighboring cell UE may additionally or alternatively at least one D2D transmission from the neighboring cell UE to another neighboring cell node (eg, to another neighboring cell UE, to a WLAN access point, etc.) Can be included. In some examples, at least one D2D transmission from a neighboring cell UE may be transmitted during a downlink subframe transmitted from the serving cell base station to the UE. In some examples, the transmission characteristic information may include one or more of modulation order, number of spatial layers, or precoding information.

  [0254] At block 2910, the serving cell base station may transmit the transmission characteristic information to one or more UEs associated with the serving cell base station. The UE may then use the transmission characteristic information to perform interference reduction (eg, interference cancellation) on signals received at the UE from the serving cell base station.

  [0255] FIG. 30 is a block diagram conceptually illustrating an apparatus 3005 such as a base station or eNB for use in wireless communications, in accordance with various aspects of the present disclosure. In some examples, apparatus 3005 may be an example of one or more aspects of base station or eNB 105 described with respect to FIG. 1 and / or FIG. Device 3005 can also be a processor. Apparatus 3005 may include a receiver module 3010, a base station interference mitigation module 3020, and / or a transmitter module 3030. Each of these components can communicate with each other.

  [0256] The components of apparatus 3005 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, these functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0257] In some examples, the receiver module 3010 may be or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. Receiver module 3010 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to receive various types of data and / or control signals (ie, transmissions).

  [0258] In some examples, the transmitter module 3030 is operable to transmit on two or more hierarchical modulation layers (eg, through a base modulation layer and one or more enhanced modulation layers). It may be or include an RF transmitter, such as a transmitter. Transmitter module 3030 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to transmit various types of data and / or control signals (ie, transmissions).

  [0259] In some examples, the base station interference reduction module 3020 may include a neighbor cell information determination module 3035 and / or a scheduler communication module 3040.

  [0260] In some examples, the base station interference reduction module 3020 may receive transmission characteristic information of signals transmitted from neighboring cells UE. The transmission characteristic information may be received, for example, through an X2 backhaul link with neighboring cell base stations and / or from a central scheduler in communication with both device 3005 and neighboring cell base stations.

  [0261] In some examples, the received transmission characteristic information may be transmission characteristic information of a signal transmitted from the neighboring cell UE. In some cases, the signal transmitted from the neighboring cell UE is an uplink sub signal transmitted from the neighboring cell UE to the neighboring cell base station according to a TDD UL / DL configuration different from the TDD UL / DL configuration used by the apparatus 3005. A frame may be included. The TDD UL / DL configuration used by the neighboring cell UE is at least one up transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the device 3005 to the UE associated with the device 3005. This uplink subframe that may include a link subframe and is transmitted from the neighboring cell UE to the neighboring cell base station may interfere with the transmission of the downlink subframe from the apparatus 3005 to the UE. In other cases, the transmission characteristic information received by neighbor cell information determination module 3035 is at least one from a neighbor cell UE to another neighbor cell node (eg, to another neighbor cell UE, to a WLAN access point, etc.). It may be transmission characteristic information of two D2D transmissions. At least one D2D transmission from the neighbor cell UE may be transmitted during a downlink subframe transmitted from the device 3005 to the UE.

  [0262] In some examples, the transmission characteristic information received by the neighbor cell information determination module 3035 may include one or more of modulation order, number of spatial layers, or precoding information.

  [0263] In some examples, the neighbor cell information determination module 3035 may additionally or alternatively receive information from which transmission characteristic information of signals transmitted from the neighbor cell UE may be determined.

  [0264] The scheduler communication module 3040 may be utilized by the base station interference reduction module 3020 to communicate with the central scheduler and relay the transmission characteristic information to the neighboring cell information determination module 3035.

  [0265] Upon receiving and / or determining transmission characteristic information of a signal transmitted from the neighboring cell UE, the base station interference reduction module 3020 transmits the transmission characteristic information to one or more UEs associated with the apparatus 3005. Can do. The UE may then use the transmission characteristic information to perform interference reduction (eg, interference cancellation) on signals (eg, downlink subframes) received at the UE from device 3005.

  [0266] FIG. 31 illustrates another wireless communication system 3100 having several cells (eg, cell I 3105-a and cell II 3105-b) and an interference cancellation environment in accordance with various aspects of the present disclosure. The wireless communication system 3100 may represent aspects of the wireless communication system 100 and / or 200 shown in FIGS. 1 and / or 2, for example. In the example of FIG. 31, each of a number of base stations (eg, base stations 105-1, 105-m, and 105-n) has their respective coverage areas (eg, coverage areas 110-e and 110-110). -F) can communicate with several UEs in (eg UE 115-p). As an example, cell I 3105-a is shown as including a first base station 105-1 and a second base station 105-m.

  [0267] Under some circumstances or conditions, there may be inter-cell interference between base stations and / or UEs of the wireless communication system 3100. For example, base station 105-1 of cell I 3105-a may receive interference 3110 from UE 115-p of cell II 3105-b. By way of example, interference 3110 can be a control channel transmission (eg, physical random access channel (PRACH), PUCCH, or sounding reference signal (SRS) transmission) or UE 115-p data. It may be the result of channel transmission (eg, PUSCH transmission). LTE systems can already implement various methods to cancel these types of interference (eg, PRACH interference cancellation (PRACH-IC), PUCCH-IC, and PUSCH-IC).

  [0268] Base station 105-l of cell I 3105-a may additionally or alternatively receive interference 3120 from base station 105-n of cell II 3105-b. As an example, interference 3120 may be a result of eIMTA, which is transmitted by base station 105-l of cell I 3105-a from one or more of the UEs that it serves as a serving cell base station. While receiving the uplink subframe, it may result in the transmission of the downlink subframe from the base station 105-n of cell II 3105-b.

  [0269] When cell I3105-a and cell II3105-b are operated by a common operator, base stations 105-l, 105-m, and 105-n communicate with each other through a communication link such as an X2 backhaul link. Can do.

  [0270] Referring now to FIG. 32, illustrated is a flowchart that conceptually illustrates an example of a method for wireless communication in a serving cell base station, in accordance with an aspect of the present disclosure. FIG. 32 illustrates an example method for inter-cell interference reduction in the wireless communication system 3100 described above with respect to FIG. 31, for example. For clarity, the method 3200 is described below with respect to one of the base stations, eNBs 105, and / or UEs 115 described with respect to FIG. 1 and / or FIG. In one example, a base station, eNB, or other device has one or more sets of codes for controlling functional elements of the base station, eNB, or other device to perform the functions described below. Can be performed.

  [0271] In block 3205, the serving cell base station may determine transmission characteristic information of signals transmitted from neighboring cell base stations. In some examples, a signal transmitted from a neighboring cell base station, for which transmission characteristic information is determined, may be different from a TDD UL / DL configuration used by a serving cell base station, for example. May include a downlink subframe transmitted to a neighboring cell UE according to For example, the TDD UL / DL configuration used by the neighboring cell base station is at least one transmitted from the neighboring cell base station to the neighboring cell UE during an uplink subframe transmitted from the UE associated with the serving cell base station. This downlink subframe that may include a downlink subframe and is transmitted from the neighboring cell base station to the neighboring cell UE may interfere with the transmission of the uplink subframe to the serving cell base station.

  [0272] In some cases, determining transmission characteristic information for signals transmitted from neighboring cell base stations monitors transmissions from neighboring cell base stations and monitors transmissions from neighboring cell base stations Determining downlink transmission characteristic information for downlink transmissions from neighboring cell base stations based on transmissions received in between.

  [0273] In block 3210, the serving cell base station may determine transmission characteristic information of a signal transmitted from the neighboring cell UE. In some examples, a signal transmitted from a neighboring cell UE, for which transmission characteristics information is determined, may be uplink control, eg, during uplink subframe transmission from a UE associated with a serving cell base station. One or more of channel transmissions or uplink data channel transmissions may be included.

  [0274] In some cases, determining transmission characteristic information of a signal transmitted from the neighboring cell UE is received while monitoring transmission from the neighboring cell UE and monitoring transmission from the neighboring cell UE. Determining transmission characteristic information of a signal transmitted from the neighboring cell UE based on the transmitted transmission. In other cases, determining transmission characteristic information of signals transmitted from neighboring cell UEs is received during monitoring transmissions from neighboring cell base stations and monitoring transmissions from neighboring cell base stations. Determining transmission characteristic information of a signal transmitted from the neighboring cell UE based on the transmission. In some examples, monitoring transmissions from neighboring cell base stations may include monitoring PDCCH of neighboring cell base stations (eg, monitoring PDCCH for uplink grants). In some examples, transmission characteristic information of signals transmitted from neighboring cells UE may include one or more of modulation order, number of spatial layers, or precoding information.

  [0275] At block 3215, the serving cell base station may perform interference reduction (eg, interference cancellation) on a signal received from a UE associated with the serving cell base station. Interference reduction may be performed based on the determined transmission characteristic information. In some examples, interference reduction may include one or more of RS-IC, Control-IC, or Data-IC that is currently implemented in the LTE system by the UE.

  [0276] In some examples, whether a neighboring cell base station or a neighboring cell UE is transmitting during an uplink subframe transmission from a UE associated with the serving cell base station (eg, serving cell base station or central cell). The interference reduction performed at block 3215 may be determined by the scheduler) and whether the neighboring cell base station or the neighboring cell UE is transmitting during an uplink subframe transmission from the UE associated with the serving cell base station. Can be based.

  [0277] In some examples, determining transmission characteristic information of signals transmitted from neighboring cell base stations and determining transmission characteristic information of signals transmitted from neighboring cell UEs Receiving transmission characteristic information over an X2 backhaul link with the station. Alternatively or additionally, the transmission characteristic information may be received from a central scheduler in communication with the serving cell base station and neighboring cell base stations.

  [0278] FIG. 33 is a block diagram conceptually illustrating a device 3305, such as a base station or eNB, for use in wireless communications, in accordance with various aspects of the present disclosure. In some examples, the device 3305 may be an example of one or more aspects of the base station or eNB 105 described with respect to FIG. 1 and / or FIG. Device 3305 may also be a processor. Device 3305 may include a receiver module 3310, a base station interference reduction module 3320, and / or a transmitter module 3330. Each of these components can communicate with each other.

  [0279] The components of device 3305 may be implemented individually or collectively using one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0280] In some examples, the receiver module 3310 may or may be an RF receiver such as an RF receiver operable to receive transmissions on two or more hierarchical modulation layers. May be included. Receiver module 3310 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to receive various types of data and / or control signals (ie, transmissions).

  [0281] In some examples, the transmitter module 3330 is operable to transmit on two or more hierarchical modulation layers (eg, through a base modulation layer and one or more enhanced modulation layers). It may be or include an RF transmitter, such as a transmitter. Transmitter module 3330 may vary through one or more communication links of a wireless communication system, such as one or more communication links 125 of wireless communication systems 100 and / or 200 described with respect to FIGS. 1 and / or 2. Can be used to transmit various types of data and / or control signals (ie, transmissions).

  [0282] In some examples, the base station interference mitigation module 3320 includes a neighboring cell base station information determination module 3335, a neighboring cell UE information determination module 3340, And / or may include a scheduler communication module 3345. When determining transmission characteristic information of a signal transmitted from a neighboring cell base station using a neighboring cell base station information determination module 3335, or using a neighboring cell UE information determination module 3340 Determining the transmission characteristic information of signals transmitted from neighboring cell UEs, base station interference reduction module 3320 receives signals from UEs associated with device 3305 (eg, UEs with which device 3305 functions as a serving cell base station). Interference reduction (eg, interference cancellation) can be performed. Interference reduction may be performed based on the determined transmission characteristic information. In some examples, base station interference reduction module 3320 can be used to perform interference reduction on multiple signals received from multiple UEs associated with device 3305. In some examples, interference reduction may include one or more of RS-IC, Control-IC, or Data-IC that is currently implemented in the LTE system by the UE.

  [0283] In some examples, the signal for which neighbor cell base station information determination module 3335 determines transmission characteristic information is different from the TDD UL / DL configuration used, for example, by the device 3305. And may include a downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE. For example, the TDD UL / DL configuration used by the neighboring cell base station is at least transmitted from the neighboring cell base station to the neighboring cell UE during an uplink subframe transmitted from the UE associated with the device 3305 to the device 3305. This downlink subframe, which may include one downlink subframe, transmitted from the neighboring cell base station to the neighboring cell UE may interfere with the transmission of the uplink subframe transmitted to the device 3305.

  [0284] In some cases, the neighboring cell base station information determination module 3335 monitors transmissions from neighboring cell base stations, and based on transmissions received while monitoring transmissions from neighboring cell base stations, By determining downlink transmission characteristic information for downlink transmission from the cell base station, it is possible to determine transmission characteristic information of signals transmitted from neighboring cell base stations.

  [0285] In some examples, the signal transmitted from the neighboring cell UE, for which transmission characteristic information is determined, may be transmitted during uplink subframe transmission from the UE associated with the device 3305 to the device 3305, for example. One or more of an uplink control channel transmission or an uplink data channel transmission.

  [0286] In some cases, the neighboring cell UE information determination module 3340 monitors transmissions from neighboring cell UEs and from neighboring cell UEs based on transmissions received while monitoring transmissions from neighboring cell UEs. By determining the transmission characteristic information of the signal to be transmitted, the transmission characteristic information of the signal transmitted from the neighboring cell UE can be determined. In other cases, the neighboring cell UE information determination module 3340 monitors transmissions from neighboring cell base stations and is transmitted from neighboring cell UEs based on transmissions received while monitoring transmissions from neighboring cell base stations. By determining the transmission characteristic information of the signal to be transmitted, it is possible to determine the transmission characteristic information of the signal transmitted from the neighboring cell UE. In some examples, monitoring transmissions from neighboring cell base stations may include monitoring PDCCH of neighboring cell base stations (eg, monitoring PDCCH for uplink grants). In some examples, transmission characteristic information of signals transmitted from neighboring cells UE may include one or more of modulation order, number of spatial layers, or precoding information.

  [0287] In another example, base station interference reduction module 3320 (or a central scheduler in communication with base station interference reduction module 3320 through scheduler communication module 3345) allows a neighboring cell base station or neighboring cell UE to communicate with device 3305. Determine if transmitting during uplink subframe transmission and perform interference reduction based on whether neighboring cell base station or neighboring cell UE is transmitting during uplink subframe transmission to device 3305 can do.

  [0288] In some examples, the neighbor cell base station information determination module 3335 or the neighbor cell UE information determination module 3340 receives the transmission characteristic information through an X2 backhaul link with the neighbor cell base station, thereby Transmission characteristic information of a signal transmitted from a station or a neighboring cell UE can be determined. In another example, the base station interference reduction module 3320 can utilize a scheduler communication module 3345 to communicate with the central scheduler, which can receive base station interference reduction modules from neighboring cell base stations or neighboring cell UEs. Transmission characteristic information of a signal transmitted to 3320 can be provided.

  [0289] Referring now to FIG. 34, a diagram shows an example wireless communication system 3400 in which one or more nodes may experience inter-radio interference. The wireless communication system 3400 may represent aspects of the wireless communication systems 100, 200, 2200, 2700, and / or 3100 shown in, for example, FIG. 1, FIG. 2, FIG. 22, FIG. In this example, cell 3405 is a radio that operates according to different wireless communication protocols, such as wireless network access point 3405, which may be located in or adjacent to one or more eNBs 105 and one or more cells 3405. Can be included. As shown in the example of FIG. 34, the wireless communication system 3400 includes cells 3405-a, 3405-b, and 3405-c. Cell 3405-a may include eNB 105-o and eNB 105-p, cell 3405-b may include eNB 105-q, and cell 3405-c may include eNB 105-r. As mentioned above, eNBs and neighboring cell UEs such as, for example, inter-eNB interference 3425-a and 3425-b, inter-UE interference 3415, and between UE 115-r and eNB 105-q in the illustration of FIG. Various sources of inter-cell interference may exist in the wireless communication system 3400, including interference 3410 with the. In addition, in the example of FIG. 34, another wireless network access point (AP) 3405 may have AP-eNB interference 3435 between AP 3405 and eNB 105-o, and AP-UE interference between AP 3405 and UE 115-q. Interference with one or more nodes of wireless communication system 3400, such as 3430, may occur. In accordance with various aspects of this disclosure, eNB 105 and UE 115 of wireless communication system 3400 monitor and detect interference cancellation techniques to reduce inter-radio interference such as AP-eNB interference 3435 and AP-UE interference 3430. And can be executed.

  [0290] Referring now to FIG. 35, a block diagram 3500 illustrates a device 3505 for use in wireless communications in accordance with various aspects of the present disclosure. In some examples, device 3505 may be configured as shown in FIGS. 1, 2, 6, 7, 7, 8, 9, 10, 13, 16, 18, 19, 20, 20A, 20B, FIG. 22, one, or more of eNB 105, UE 115, or devices 405, 1305, 1605, 2005, 2505, 3005, 3205 described with respect to FIG. 25, FIG. 27, FIG. 30, FIG. 31, FIG. This may be an example of this embodiment. Device 3505 may also be one or more aspects of a node operating in accordance with the IEEE 802.11 protocol (hereinafter referred to as Wi-Fi node), such as access point 3405 described with respect to FIG. 34 in some examples. . Device 3505 may also be a processor. Device 3505 may include a receiver module 3510, an interference reduction module 3520, and / or a transmitter module 3530. Each of these components can communicate with each other.

  [0291] The components of device 3505 may be implemented individually or collectively by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Alternatively, those functions may be performed on one or more integrated circuits by one or more other processing units (or cores). In other examples, other types of integrated circuits (eg, structured / platform ASIC, FPGA, and other semi-custom ICs) that can be programmed in any manner known in the art may be used. The functionality of each unit may also be implemented in whole or in part using instructions embodied in memory formatted to be executed by one or more general purpose or special purpose processors. .

  [0292] In some examples, the receiver module 3510 is operable to receive transmissions on two or more hierarchical modulation layers and is also operable to receive transmissions from other types of radios. The RF receiver may be or may include an RF receiver, such as an RF receiver capable, such as an unlicensed radio spectrum or a Wi-Fi node radio. And may include radios that operate according to different wireless communication protocols such as the LTE protocol. In some examples, transmitter module 3530 may be or include an RF transmitter, such as an RF transmitter operable to transmit data on two or more hierarchical modulation layers. . The RF transmitter 3530 may in some examples include a single transmitter, or may include a single transmitter per transmit / receive chain. The transmitter module 3530 is a wireless communication system 100, 200, 700 described with respect to FIGS. 1, 2, 7, 8, 9, 18, 18, 22, 27, 30, and / or 34. , 800, 900, 1800, 2200, 2700, 3000, and / or 3400, one or more communication links 125, etc., and various types of data and / or data over one or more communication links of a wireless communication system. Or it can be used to transmit a control signal (ie transmission).

  [0293] The interference reduction module 3520 may include a co-channel interference detection module 3535, an adjacent channel interference detection module 3540, and an interference cancellation module 3545. Each of these components can communicate with each other. Co-channel interference detection module 3535 may detect signals from one or more radios that may be operating in the same frequency channel as the wireless communication system in which device 3505 operates. For example, if device 3505 is part of a Wi-Fi node, co-channel interference detection module 3535 operates in an unlicensed radio frequency spectrum, such as a node that operates in an unlicensed spectrum according to the LTE protocol. Interference from other radios can be detected. Similarly, if the device 3505 is part of an LTE node operating in an unlicensed spectrum, the co-channel interference detection module 3535 can detect interference from a WiFi node operating in the same spectrum. In some examples, the co-channel interference detection module 3535 can determine the transmission characteristics of the co-channel transmission. Such transmission characteristics can be used in interference cancellation techniques, for example, to cancel detected co-channel interference. In some examples, the co-channel interference detection module 3535 can monitor the channel for a wireless transmission preamble (eg, WiFi preamble) associated with the interference transmission, which preamble determines the packet characteristics of the interference signal. Can be used.

  [0294] Adjacent channel interference detection module 3540 detects signals from one or more radios that may be operating in a frequency channel adjacent to the wireless communication system in which device 3505 operates. be able to. For example, if device 3505 is part of an LTE node (eg, a UE or eNB aspect that operates using LTE in a licensed spectrum), adjacent channel interference detection module 3540 operates in the adjacent spectrum. Interference from a WiFi node that detects that a portion of the signal leaks into the wireless communication channel of device 3505 in the adjacent spectrum. In some examples, the adjacent channel interference detection module 3540 can determine transmission characteristics of adjacent channel transmissions. Such transmission characteristics can be used in interference cancellation techniques, for example, to cancel detected adjacent channel interference. In some examples, the adjacent channel interference detection module 3540 can monitor the channel for a wireless transmission preamble (eg, a WiFi preamble) associated with the interference transmission, which preamble determines the packet characteristics of the interference signal. Can be used.

  [0295] Interference cancellation module 3545 uses one or more characteristics provided by co-channel interference detection module 3535 and / or adjacent channel interference detection module 3540 to cancel the interference associated with the detected interference signal. can do. Interference cancellation techniques according to various examples are described above, such as linear MMSE suppression for co-channel interference, QR-SD, SIC, and non-linear interference cancellation techniques for adjacent channel interference. It may include techniques as discussed. Non-linear interference cancellation techniques, for example, estimate adjacent channel leakage from transmissions on adjacent channels, and provide estimated channel leakage to an adaptive filter that can cancel the estimated leakage. Can be included.

  [0296] Referring now to FIG. 36, illustrated is a flowchart that conceptually illustrates an example method for wireless communication in accordance with an aspect of the present disclosure. FIG. 36 shows an example of inter-radio interference cancellation according to various examples. For clarity, the method 3600 is illustrated in FIGS. 1, 2, 6, 7, 8, 8, 9, 13, 13, 16, 18, 19, 20A, 20B, FIG. 22, FIG. 25, FIG. 27, FIG. 30, FIG. 31, FIG. 32, FIG. 34, and / or FIG. 35, the base station or eNB 105, UE 115, or devices 405, 1305, 1605, 2005, 2505, 3005, One of 3205, 3505 is described below. In one example, an eNB, UE, or device may execute one or more sets of codes for controlling functional elements of the eNB, UE, or device to perform the functions described below.

  [0297] In block 3605, communication may be established on the first wireless communication channel to receive a wireless transmission from the transmitting node. At block 3610, transmissions from other nodes on one or more other wireless communication channels may be monitored. At block 3615, the preambles of monitored transmissions on other wireless communication channels may be decoded. For example, if the method is being performed on a UE operating according to the LTE protocol in the unlicensed spectrum, the UE can monitor for interference from other radios operating on the same channel and can detect one or more detected The transmitted preamble can be decoded. At block 3620, transmission characteristics of transmissions on other wireless communication channels may be determined.

  [0298] As indicated at block 3625, interference cancellation may then be performed on the signal received from the node on the first wireless communication channel based on the determined information. As noted above, interference cancellation uses, for example, the estimated interference from the detected interference signal from the second wireless communication channel based on the decoded transmission preamble, and the first wireless communication It may be performed by performing interference cancellation on the signal received on the channel. The estimated interference can be, for example, RF nonlinearities, harmonics introduced from other wireless communication channels to the first wireless communication channel, intermodulation distortion (IMD) from other wireless communication channels, other wireless communication channels One or more of channel leakage from or a coupling between the first wireless communication channel and other wireless communication channels.

  [0299] Referring now to FIG. 37, illustrated is a flowchart that conceptually illustrates an example method for interference cancellation in wireless communications, in accordance with aspects of the present disclosure. For clarity, the method 3700 is shown in FIGS. 1, 2, 6, 7, 8, 8, 9, 13, 13, 16, 18, 19, 20A, 20B, and FIG. 22, FIG. 25, FIG. 27, FIG. 30, FIG. 31, FIG. 32, FIG. 34, and / or FIG. 35, the base station or eNB 105, UE 115, or devices 405, 1305, 1605, 2005, 2505, 3005, One of 3205, 3505 is described below. In one example, an eNB, UE, or device may execute one or more sets of codes for controlling functional elements of the eNB, UE, or device to perform the functions described below.

  [0300] In block 3705, communication may be established on the first wireless communication channel to receive a wireless transmission from the transmitting node. At block 3710, samples of transmissions from other nodes on one or more other wireless communication channels may be collected. At block 3715, transmission characteristics of transmissions on other wireless communication channels may be determined based on the samples. At block 3720, interference cancellation may be performed on the signal received from the node on the first wireless communication channel based on the determined information. In such a manner, non-linear leakage or other interference can be reduced, thereby improving the reception of signals on the first wireless communication channel and the wireless communication system. Improve the efficiency.

  [0301] Referring to FIG. 38, illustrated is a drawing 3800 illustrating a base station or eNB 105-s configured for hierarchical modulation and interference cancellation. In some embodiments, the base station 105-s may be the base station of FIGS. 1, 2, 7, 7, 9, 18, 18, 22, 27, 31, and / or FIG. It may be an example of eNB. Base station 105-s may be configured to implement at least some of the features and functions described above with respect to FIGS. Base station 105-s includes a processor module 3810, a memory module 3820, a transceiver module 3855, an antenna 3860, and an eNB interference cancellation / hierarchical modulation (IC / HM) module 3870. obtain. Base station 105-s may also include one or both of base station communication module 3830 and network communication module 3840. Each of these components may communicate with each other directly or indirectly through one or more buses 3815.

  [0302] The memory module 3820 may include random access memory (RAM) and read only memory (ROM). The memory module 3820 also includes computer readable computer executable software (SW) code 3825 that, when executed, includes instructions configured to cause the processor module 3810 to perform various functions described herein. You can remember. Alternatively, software code 3825 may not be directly executable by processor module 3810, but may be configured to cause a computer to perform the functions described herein, for example, when compiled and executed. Can be done.

  [0303] The processor module 3810 may include intelligent hardware devices, such as a central processing unit (CPU), microcontroller, ASIC, and the like. The processor module 3810 may process information received through the transceiver module 3855, the base station communication module 3830, and / or the network communication module 3840. The processor module 3810 may also process information to be transmitted to the transceiver module 3855 for transmission through the antenna 3860, the base station communication module 3830, and / or the network communication module 3840. The processor module 3810 may handle various aspects of interference cancellation and / or hierarchical modulation using multiple modulation layers as described herein, either alone or in conjunction with the eNB IC / HM module 3870.

  [0304] The transceiver module 3855 may include a modem configured to modulate the packet, provide the modulated packet to the antenna 3860 for transmission, and demodulate the packet received from the antenna 3860. The transceiver module 3855 may be implemented as one or more transmitter modules and one or more separate receiver modules. The transceiver module 3855 may support communication on multiple hierarchical modulation layers. The transceiver module 3855 is shown, for example, in FIGS. 1, 2, 6, 6, 7, 8, 9, 18, 22, 27, 31, and / or 34 via the antenna 3860. May be configured to communicate bi-directionally with one or more UEs 115 as described. Base station 105-s may include multiple antennas 3860 (eg, an antenna array). The base station 105-s can communicate with the core network 130-a through the network communication module 3840. The core network 130-a may be an example of the core network 130 of FIG. Base station 105-s can communicate with other base stations such as base station 105-t and base station 105-u using base station communication module 3830.

  [0305] According to the architecture of FIG. 38, the base station 105-s may further include a communications management module 3850. Communication management module 3850 may manage communications with stations and / or other devices. The communication management module 3850 may be in communication with some or all of the other components of the base station 105-s via one or more buses 3815. Alternatively, the functionality of the communication management module 3850 may be implemented as a component of the transceiver module 3855, as a computer program product, and / or as one or more controller elements of the processor module 3810.

  [0306] The eNB IC / HM module 3870 may be configured to perform and / or control some or all of the functions or aspects described in FIGS. 1-37 related to hierarchical modulation and interference cancellation. For example, eNB IC / HM module 3870 may be configured to support interference cancellation of multiple hierarchical modulation layers, within a cell, between cells, and / or between radios. The eNB IC / HM module 3870 determines parameters associated with various transmissions for use in hierarchical modulation (HM) and / or basic modulation layer interference cancellation as described herein. An HM parameter module 3880 may be included. The HM modulation module 3885 may perform modulation of various content to different hierarchical modulation layers, as well as superposition of one or more enhancement modulation layers to the base modulation layer. An interference parameter determination module 3890 can determine various parameters related to the interference signal, which can be determined by an interference cancellation module 3895 to cancel the interference from the interference signal. Can be used. The eNB IC / HM module 3870, or part thereof, may be a processor. Moreover, some or all of the functionality of the eNB IC / HM module 3870 may be performed by and / or with the processor module 3810.

  [0307] Referring to FIG. 39, illustrated is a drawing 3900 illustrating a UE 115-s configured for hierarchical modulation and interference cancellation. The UE 115-s may have various other configurations, such as a personal computer (eg, laptop computer, netbook computer, tablet computer, etc.), mobile phone, smartphone, PDA, digital video recorder (DVR), Internet equipment Can be included in or part of a game console, electronic reader, and the like. The UE 115-s may have an internal power source (not shown) such as a small battery to facilitate mobile operation. The station UE115-s may be configured for the UE115 of FIGS. 1, 2, 6, 7, 8, 9, 18, 18, 22, 27, 31, 34, 39, and / or 40. It can be an example. The UE 115-s may be configured to implement at least some of the features and functions described above with respect to FIGS.

  [0308] The UE 115-s may include a processor module 3910, a memory module 3920, a transceiver module 3940, an antenna 3950, and a UE IC / HM module 3960. Each of these components may communicate with each other directly or indirectly through one or more buses 3905.

  [0309] The memory module 3920 may include a RAM and a ROM. Memory module 3920 stores computer-readable computer-executable software (SW) code 3925 that, when executed, includes instructions configured to cause processor module 3910 to perform various functions described herein. Can do. Alternatively, software code 3925 may not be directly executable by processor module 3910, but may cause a computer to perform the functions described herein (eg, when compiled and executed). Can be configured.

  [0310] The processor module 3910 may include intelligent hardware devices such as CPUs, microcontrollers, ASICs, and the like. The processor module 3910 may process information received through the transceiver module 3940 and / or information transmitted to the transceiver module 3940 for transmission through the antenna 3950. The processor module 3910 may handle various aspects of hierarchical modulation and interference cancellation alone or in conjunction with the UE IC / HM module 3960.

  [0311] The transceiver module 3940 may be configured to communicate bi-directionally with a base station (eg, base station 105). The transceiver module 3940 may be implemented as one or more transmitter modules and one or more separate receiver modules. The transceiver module 3940 may support communication on multiple hierarchical modulation layers. Transceiver module 3940 may include a modem configured to modulate the packet, provide the modulated packet to antenna 3950 for transmission, and demodulate the packet received from antenna 3950. Although UE 115-s may include a single antenna, there may be embodiments where UE 115-s may include multiple antennas 3950.

  [0312] According to the architecture of FIG. 39, the UE 115-s may further include a communication management module 3930. The communication management module 3930 can manage communication with various access points. Communication management module 3930 may be a component of UE 115-s that is in communication with some or all of the other components of UE 115-s through one or more buses 3905. Alternatively, the functionality of the communication management module 3930 may be implemented as a component of the transceiver module 3940, as a computer program product, and / or as one or more controller elements of the processor module 3910.

  [0313] The UE IC / HM module 3960 may perform and / or perform some or all of the functions or aspects described in FIGS. 1-37 related to transmission and reception of hierarchical modulation layers and various interference cancellation procedures. It can be configured to control. For example, the UE IC / HM module 3960 may be configured to support multiple hierarchical modulation layers, intra-cell, inter-cell, and / or inter-radio interference cancellation. The UE IC / HM module 3960 is configured to determine parameters associated with various transmissions for use in hierarchical modulation (HM) and / or basic modulation layer interference cancellation as described herein. UE HM parameter module 3965 may be included. The HM modulation module 3970 may perform modulation of various content to different hierarchical modulation layers, as well as superposition of one or more enhancement modulation layers to the base modulation layer. The interference parameter determination module 3975 can determine various parameters related to the interference signal, and these parameters can be used by the interference cancellation module 3980 to cancel the interference from the interference signal. The UE IC / HM module 3960, or part thereof, may be a processor. Moreover, some or all of the functionality of the UE IC / HM module 3960 may be performed by and / or with the processor module 3910.

  [0314] Referring now to FIG. 40, a block diagram of a multiple-input multiple-output (MIMO) communication system 4000 is shown that includes a base station 105-v and a user equipment or UE 115-t. Base station 105-v and UE 115-t may support multiple hierarchical modulation layers and / or interference cancellation. The base station 105-v is the base station or eNB example of FIGS. 1, 2, 7, 8, 9, 18, 18, 22, 27, 31, 34, and / or 38. The UE 115-t may be the UE of FIG. 1, 2, 6, 7, 7, 8, 9, 18, 18, 22, 27, 31, 34, and / or 39. It can be an example. The MIMO communication system 4000 includes the wireless communication systems 100, 200, 700, 800, FIGS. 1, 2, 7, 8, 9, 18, 22, 27, 31, and / or 34. 900, 1800, 2300, 2700, 3100, and / or 3400 aspects may be shown.

  [0315] The base station 105-v may include antennas 4034-a to 4034-x, and the UE 115-t may include antennas 4052-a to 4052-n. In the MIMO communication system 4000, the base station 105-v may be able to transmit data simultaneously over multiple communication links. Each communication link may be referred to as a “spatial layer”, and the “rank” of the communication link may indicate the number of spatial layers used for communication. For example, in a 2 × 2 MIMO communication system in which the base station 105-v transmits two “spatial layers”, the rank of the communication link between the base station 105-v and the UE 115-t is 2.

  [0316] At base station 105-v, a transmit (Tx) processor 4020 may receive data from a data source. Transmit processor 4020 may process the data. Transmit processor 4020 may also generate reference symbols and cell-specific reference signals. A transmit (Tx) MIMO processor 4030 may perform spatial processing (eg, precoding) on the data symbols, control symbols, and / or reference symbols, if applicable, and transmit the output symbol stream to a transmit modulator. 4032-a to 4032-x. Each modulator 4032 may process a respective output symbol stream (eg, for OFDM, etc.) to obtain an output sample stream. Each modulator 4032 may further process (eg, convert to analog, amplify, filter, and upconvert) its output sample stream to obtain a downlink (DL) signal. In one example, DL signals from modulators 4032-a through 4032-x may be transmitted via antennas 4034-a through 4034-x, respectively.

  [0317] In UE 115-t, antennas 4052-a to 4052-n can receive DL signals from base station 105-v, and provide the received signals to demodulators 4054-a to 4054-n, respectively. be able to. Each demodulator 4054 may condition (eg, filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator 4054 may further process input samples (eg, for OFDM, etc.) to obtain received symbols. A MIMO detector 4056 obtains received symbols from all demodulators 4054-a through 4054-n, performs MIMO detection on the received symbols, if applicable, and provides detected symbols. obtain. A receive (Rx) processor 4058 processes (eg, demodulates, deinterleaves, and decodes) the detected symbols, provides decoded data of UE 115-t to the data output, and provides decoded control information to processor 4080, Or it can be given to the memory 4082. The processor 4080 may include a module or function 4081 that may perform various functions related to hierarchical modulation and / or interference cancellation. For example, the module or function 4081 may perform some or all of the functions described above with respect to FIGS.

  [0318] On the uplink (UL), at the UE 115-t, a transmit (Tx) processor 4064 may receive and process data from the data source. TX processor 4064 may also generate reference symbols for the reference signal. The symbols from Tx processor 4064 are precoded by Tx MIMO processor 4066, where applicable, and further processed by demodulators 4054-a through 4054-n (eg, for SC-FDMA, etc.) and May be transmitted to the base station 105-v according to the transmission parameters received from -v. At base station 105-v, the UL signal from UE 115-t is received by antenna 4034, processed by demodulator 4032 and, if applicable, detected by MIMO detector 4036 and may be further processed by a receiving processor. A receive (Rx) processor 4038 may provide the decoded data to a data output and processor 4040. The processor 4040 can include a module or function 4041 that can perform various aspects related to hierarchical modulation and / or interference cancellation. For example, the module or function 4041 may perform some or all of the functions described above with respect to FIGS.

  [0319] FIG. 41 illustrates a method 4100 that may be performed by a base station or eNB, or other entity in a wireless communication system, in accordance with various embodiments. The method 4100 may be performed, for example, by the base station or eNB 105 of FIGS. 1, 2, 7, 8, 9, 18, 18, 22, 27, 31, 34, 38, and / or 40. Or described by or with respect to devices 405, 2005, 3005, 3305, and / or 3505 of FIGS. 4, 10, 20A, 20B, 30, 33, and / or 35. Any combination of devices can be implemented. Initially, at block 4105, the base station may identify a first content for transmission, the first content being associated with a first error rate threshold. At block 4110, the base station can identify second content for transmission, wherein the second content is associated with a second error rate threshold that is higher than the first error rate threshold. At block 4115, the base station may modulate the first content on the base modulation layer. As shown in block 4120, the base station may modulate the second content on the enhanced modulation layer. In block 4125, the base station may superimpose the enhancement modulation layer on the base modulation layer. In block 4130, the base station may transmit the superimposed base modulation layer and enhancement modulation layer.

  [0320] FIG. 42 illustrates a method 4200 that may be performed by a UE or other entity in a wireless communication system, in accordance with various embodiments. The method 4200 may be performed, for example, by the UE 115 of FIGS. 1, 2, 6, 7, 8, 9, 18, 18, 22, 27, 31, 34, 39, and / or 40. Or any of the devices described by or with reference to devices 1305, 1605, 2505, and / or 3505 of FIGS. 13, 15, 16, 19, 25, and / or 35 It can be implemented using a combination. Initially, at block 4205, the UE may receive a signal comprising an enhancement modulation layer superimposed on a base modulation layer. At block 4210, the UE may determine that data should be decoded from the enhanced modulation layer by performing interference reduction on the received signal to reduce interference from the base modulation layer. . At block 4215, the UE may decode the enhancement modulation layer.

  [0321] FIG. 43 illustrates a method 4300 that may be performed by a base station or eNB 105, or other entity in a wireless communication system, in accordance with various embodiments. The method 4300 may be performed, for example, by the base station or eNB of FIGS. 1, 2, 7, 8, 9, 18, 18, 22, 27, 31, 34, 38, and / or 40. Or described by or with respect to devices 405, 2005, 3005, 3305, and / or 3505 of FIGS. 4, 10, 20A, 20B, 30, 33, and / or 35. Any combination of devices can be implemented. Initially, at block 4305, the base station can receive a resource grant that identifies a hierarchical modulation resource, where the hierarchical modulation resource comprises a base modulation layer and an enhancement modulation layer, the base modulation layer being an enhancement modulation layer. Has a lower error rate threshold. At block 4310, the base station can identify first content for transmission on the base modulation layer. In block 4315, the base station can identify the second content for transmission on the enhanced modulation layer. In block 4320, the base station may superimpose the enhancement modulation layer on the base modulation layer. In block 4325, the base station may transmit the superimposed base modulation layer and enhancement modulation layer.

  [0322] FIG. 44 illustrates a method 4400 that may be performed by a UE or other entity in a wireless communication system, in accordance with various embodiments. The method 4400 may be performed, for example, by the UE 115 of FIGS. 1, 2, 6, 7, 8, 9, 18, 18, 22, 27, 31, 34, 39, and / or 40. Or any of the devices described by or with reference to devices 1305, 1605, 2505, and / or 3505 of FIGS. 13, 15, 16, 19, 25, and / or 35 It can be implemented using a combination. Initially, in block 4405, the UE may determine transmission characteristic information for signals transmitted from neighboring cells UE. In block 4410, the UE may perform interference cancellation on the signal received from the serving cell base station based on the determined transmission characteristic information.

  [0323] FIG. 45 illustrates a method 4500 that may be performed by a base station or eNB, or other entity in a wireless communication system, in accordance with various embodiments. The method 4500 may be performed, for example, by the base station or eNB 105 of FIGS. 1, 2, 7, 8, 9, 18, 18, 22, 27, 31, 34, 38, and / or 40. Or described by or with respect to devices 405, 2005, 3005, 3305, and / or 3505 of FIGS. 4, 10, 20A, 20B, 30, 33, and / or 35. Any combination of devices can be implemented. Initially, at block 4505, the base station can determine transmission characteristic information for signals transmitted from neighboring cell base stations. In block 4510, the base station may determine transmission characteristic information of signals transmitted from neighboring cells UE. In block 4515, the base station may perform interference cancellation on the signal received from the serving cell UE based on the determined information.

  [0324] FIG. 46 illustrates a method 4600 that may be performed by a base station or eNB, UE, or other entity in a wireless communication system, according to various embodiments. The method 4600 can be implemented, for example, in FIGS. 1, 2, 6, 7, 8, 9, 18, 18, 22, 27, 31, 34, 38, 39, and / or 40. 4, 10, 13, 15, 16, 19, 20 A, 20 B, 25, 30, 33, and / or 35. Device 405, 1305, 1605, 2005, 2505, 3005, 3305, and / or 3505, or using any combination of devices described with respect to these figures. Initially, at block 4605, a first wireless communication channel is established for receiving a wireless transmission from a transmitting node. At block 4610, transmission channel information for a second wireless communication channel that is different from the first wireless communication channel is determined. At block 4615, interference reduction is performed on a signal received on the first wireless communication channel from the transmitting node based on the transmission channel information of the second wireless communication channel.

  [0325] The detailed description set forth above with reference to the accompanying drawings describes exemplary embodiments and represents the best embodiments that can be implemented or fall within the scope of the claims. is not. As used throughout this specification, the term "example" or "exemplary" means "serving as an example, instance, or illustration" and is preferred to "preferred" or "other embodiments" Does not mean “advantageous”. The detailed description includes specific details to provide an understanding of the techniques described. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.

  [0326] Information and signals may be represented using any of a wide variety of techniques and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any of them Can be represented by a combination.

  [0327] Various exemplary blocks and modules described in connection with the disclosure herein include general purpose processors, digital signal processors (DSPs), ASICs, FPGAs or other programmable logic devices, individual gate or transistor logic, individual hardware Hardware component, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors associated with a DSP core, or any other such configuration. obtain.

  [0328] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or a combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement functions can also be physically located at various locations, including being distributed such that portions of the functions are implemented at different physical locations. As used herein, including the claims, the word “and / or” when used in the listing of two or more items is any one of the listed items. Means that one can be employed alone, or any combination of two or more of the listed items can be employed. For example, if a composition is described as containing components A, B, and / or C, the composition is A only, B only, C only, A and B combination, A and C combination , B and C, or A, B and C. Also, as used herein, including the claims, an enumeration of items (e.g., an enumeration of items preceded by a phrase such as "at least one of" or "one or more of"). As used herein, “or” means, for example, that the recitation of “at least one of A, B, or C” is A or B or C or AB or AC or BC or ABC (ie, A and B and Shows a disjunctive enumeration meaning C).

  [0329] Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, computer-readable media includes RAM, ROM, electrically erasable programmable ROM (EEPROM®), compact disk ROM (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic It may comprise a storage device or any other medium that is used to carry or store the desired program code means in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or general purpose or special purpose processor. Any connection is also properly termed a computer-readable medium. For example, software sends from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, wireless, and microwave Where included, coaxial technology, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media. Discs and discs used in this specification are CD (disc), laser disc (registered trademark) (disc), optical disc (disc), digital versatile disc (DVD), floppy ( (Registered trademark) disk and Blu-ray (registered trademark) disc, which normally reproduces data magnetically, and the disc optically reproduces data with a laser. To play. Combinations of the above are also included within the scope of computer-readable media.

  [0330] As used herein, the terms "apparatus" and "device" are interchangeable.

  [0331] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Throughout this disclosure, the term “example” or “exemplary” indicates an example or instance and does not imply or require a preference for the mentioned example. Accordingly, the present disclosure should not be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.
  The invention described in the scope of the claims of the present invention is appended below.
[C1]
  A method for transmitting hierarchical content comprising:
  Identifying first content for transmission and said first content is associated with a first error rate threshold;
  Identifying a second content for transmission, wherein the second content is associated with a second error rate threshold that is higher than the first error rate threshold;
  Modulating the first content on a basic modulation layer;
  Modulating the second content on an enhanced modulation layer;
  Superimposing the enhancement modulation layer on the basic modulation layer;
  Transmitting the superimposed base modulation layer and enhancement modulation layer.
[C2]
  The method of C1, wherein the first error rate threshold and the second error rate threshold are based on a type of information contained in the first content and the second content.
[C3]
  The method of C1, wherein the first content comprises high priority content and the second content comprises low priority content.
[C4]
  The method of C1, wherein the first content and the second content are transmitted to the same user equipment.
[C5]
  The method of C1, wherein the first content and the second content are transmitted to different user equipment.
[C6]
  The method of C1, wherein the first content comprises control information for a user equipment (UE) configured to receive the first content.
[C7]
  The method of C6, wherein the control information comprises one or more of scheduling grant information, acknowledgment information, or signaling information.
[C8]
  The method of C6, wherein the UE is configured to refrain from sending an acknowledgment of receipt of the control information.
[C9]
  The method of C6, wherein the second content comprises user data.
[C10]
  The method of C9, wherein the UE is configured to send an acknowledgment of receipt of the user data.
[C11]
  The control information is transmitted using a physical downlink control channel (PDCCH) on the basic modulation layer, and the user data is transmitted using a physical downlink shared channel (PDSCH) on the enhanced modulation layer. The method of C9.
[C12]
  The first content comprises unicast data that is sensitive to latency for a first user equipment (UE), and the second content is a best effort unicode for the first UE or a different UE. The method of C1, comprising cast data.
[C13]
  Unicast data that is sensitive to the latency is transmitted using a physical downlink shared channel (PDSCH) on the basic modulation layer, and the best effort unicast data uses PDSCH on the enhanced modulation layer. The method according to C12, wherein
[C14]
  The method of C1, wherein the first content comprises unicast data for a particular user equipment (UE) and the second content comprises broadcast data.
[C15]
  The method of C1, wherein the first content comprises broadcast data and the second content comprises unicast data for a particular user equipment (UE).
[C16]
  The broadcast data is transmitted on the basic modulation layer using a physical multicast channel (PMCH), and the unicast data is transmitted on the enhanced modulation layer using a physical downlink shared channel (PDSCH). The method according to C15.
[C17]
  A UE configured to receive the broadcast data is configured to refrain from sending an acknowledgment of receipt of the broadcast data, and the particular UE sends an acknowledgment of receipt of the unicast data The method of C15, configured to:
[C18]
  Determining channel state information (CSI) of channels to be used for transmission of the base modulation layer and the enhanced modulation layer;
  The method of C1, further comprising calculating a transmission energy ratio between the base modulation layer and the enhanced modulation layer based on the CSI.
[C19]
  The method of C18, wherein determining the CSI and calculating the transmission energy ratio is performed for each of a plurality of transmission time intervals (TTIs).
[C20]
  Determining the number of spatial layers available for transmission of the base modulation layer and the enhanced modulation layer;
  The method of C1, further comprising: transmitting the superimposed base modulation layer and enhancement modulation layer on the determined number of spatial layers.
[C21]
  The method of C20, wherein determining the number of spatial layers is based on a rank indicator (RI) from at least one user equipment.
[C22]
  Determining channel state information (CSI) for a plurality of user equipments (UEs);
  C1 further comprising: instructing which of the plurality of UEs should receive one or more of the base modulation layer or the enhancement modulation layer based on the CSI of the plurality of UEs. the method of.
[C23]
  Transmitting the superimposed basic modulation layer and the enhanced modulation layer;
  Transmitting the base modulation layer to one or more UEs determined to have lower channel quality based on the determined CSI;
  Transmitting the enhancement modulation layer to the one or more UEs determined to have higher channel quality based on the determined CSI.
[C24]
  The method of C1, further comprising transmitting signaling information to at least one user equipment (UE) to receive the superimposed base modulation layer and enhancement modulation layer.
[C25]
  The signaling information is a transmission energy ratio between the basic modulation layer and the enhanced modulation layer, a transport block size for the basic modulation layer and the enhanced modulation layer, or for the basic modulation layer and the enhanced modulation layer. The method of C24, comprising one or more of the following modulation and coding schemes:
[C26]
  The method of C24, wherein the signaling information comprises a downlink grant for the UE indicating downlink resources for the UE on one or more of the base modulation layer or the enhanced modulation layer.
[C27]
  The downlink grant is
  Resource block location of data transmitted to the UE on one or more of the base modulation layer or the enhanced modulation layer;
  Modulation and coding scheme (MCS) of data transmitted to the UE on one or more of the basic modulation layer or the enhanced modulation layer;
  A precoding matrix used to transmit on one or more of the base modulation layer or the enhancement modulation layer;
  Layer mapping for one or more of the base modulation layer or the enhanced modulation layer;
  Code block size for one or more of the base modulation layer or the enhanced modulation layer, or
  The method of C26, indicating one or more of the number of spatial layers for one or more of the base modulation layer or the enhanced modulation layer.
[C28]
  The method of C26, wherein the downlink grant is a single downlink grant comprising information for the base modulation layer or the enhanced modulation layer.
[C29]
  The method of C24, wherein the signaling information comprises two or more downlink grants for two or more UEs, each downlink grant corresponding to the base modulation layer or the enhanced modulation layer.
[C30]
  The method of C29, wherein each downlink grant comprises an indication of the base modulation layer or enhancement modulation layer and downlink resources of the indicated base modulation layer or enhancement modulation layer.
[C31]
  The method of C30, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the downlink grant.
[C32]
  Cell radio network temporary identifier for the UE to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the downlink resource for the base modulation layer or the enhancement modulation layer The method of C30, comprising a cyclic redundancy check (CRC) masked by (C-RNTI).
[C33]
  The C-RNTI for the basic modulation layer comprises a primary cell radio network temporary identifier (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is for the UE The method of C32, comprising a secondary cell radio network temporary identifier (SC-RNTI).
[C34]
  The method of C24, wherein the signaling information comprises radio resource control (RRC) signaling.
[C35]
  The RRC signaling comprises an energy ratio between the basic modulation layer and the enhancement modulation layer, a modulation scheme for the basic modulation layer, a modulation scheme for the enhancement modulation layer, a resource block size for the basic modulation layer; Or the method of C34, comprising one or more of a resource block size for the enhanced modulation layer.
[C36]
  The method of C24, wherein the signaling information is provided using a physical control format indicator channel (PCFICH).
[C37]
  The method of C24, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.
[C38]
  The method of C1, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.
[C39]
  The method of C1, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.
[C40]
  The modulation scheme for the basic modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature phase amplitude modulation (QAM) scheme in C39 The method described.
[C41]
  A method for wireless communication,
  Receiving a signal comprising an enhanced modulation layer superimposed on a base modulation layer;
  Determining that data should be decoded from the enhanced modulation layer by performing interference reduction on the received signal to reduce interference from the base modulation layer;
  Decoding the enhancement modulation layer.
[C42]
  Determining that data should be decoded from the enhanced modulation layer;
  The method of C41, comprising receiving control signaling from a serving base station indicating that data should be decoded from the enhanced modulation layer.
[C43]
  The method of C42, wherein the control signaling comprises a downlink grant indicating a resource to be decoded at the enhanced modulation layer.
[C44]
  The method of C42, wherein the control signaling comprises signal characteristics of the base modulation layer for use in performing the interference reduction.
[C45]
  The method of C42, wherein the control signaling is provided in the base modulation layer.
[C46]
  Performing the interference reduction,
  The method of C41, comprising performing linear minimum mean square error (MMSE) suppression on the received signal to reduce interference from the base modulation layer.
[C47]
  Performing the interference reduction,
  The method of C41, comprising performing QR decomposition-based spherical decoding (QR-SD) on the received signal to reduce interference from the base modulation layer.
[C48]
  Performing the interference reduction,
  The method of C41, comprising performing continuous interference cancellation (SIC) on the received signal to reduce interference from the base modulation layer.
[C49]
  A method for transmitting hierarchical content comprising:
  Receiving a resource grant identifying a hierarchical modulation resource; and the hierarchical modulation resource comprises a base modulation layer and an enhancement modulation layer, the base modulation layer having a lower error rate threshold than the enhancement modulation layer ,
  Identifying first content for transmission on the base modulation layer;
  Identifying second content for transmission on the enhanced modulation layer;
  Superimposing the enhancement modulation layer on the basic modulation layer;
  Transmitting the superimposed base modulation layer and enhancement modulation layer.
[C50]
  The method of C49, wherein the base modulation layer comprises a physical uplink control channel (PUCCH) and the enhanced modulation layer comprises a physical uplink shared channel (PUSCH).
[C51]
  The method of C49, wherein both the base modulation layer and the enhanced modulation layer comprise physical uplink shared channels (PUSCH).
[C52]
  The method of C49, wherein the first content comprises high priority content and the second content comprises low priority content.
[C53]
  Receiving the resource grant;
  The method of C49, comprising receiving an uplink grant from a base station indicating a hierarchical modulation resource for both the base modulation layer and the enhanced modulation layer.
[C54]
  The uplink grant is one or more of an energy ratio between the base modulation layer and the enhancement modulation layer, layer mapping information, code block size, or the number of spatial layers within the base modulation layer and the enhancement modulation layer A method according to C53, comprising:
[C55]
  The method of C53, wherein the uplink grant further indicates a number of spatial layers for transmission of the base modulation layer and the enhanced modulation layer.
[C56]
  The method of C49, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.
[C57]
  The method of C49, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.
[C58]
  The modulation scheme for the basic modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature phase amplitude modulation (QAM) scheme, to C57 The method described.
[C59]
  Receiving the resource grant;
  Receiving a first uplink grant indicating a hierarchical modulation resource for the base modulation layer from a base station;
  Receiving the second uplink grant from the base station indicating a hierarchical modulation resource for the enhanced modulation layer.
[C60]
  The method of C59, wherein the first uplink grant and the second uplink grant include spatial information indicating a number of spatial layers in a corresponding modulation layer.
[C61]
  The first uplink grant and the second uplink grant comprise an indication of the base modulation layer or the enhancement modulation layer and uplink resources of the indicated base modulation layer or enhancement modulation layer. The method described in 1.
[C62]
  The method of C61, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the first uplink grant and the second uplink grant.
[C63]
  Cell radio for user equipment (UE) to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the uplink resource for the base modulation layer or the enhancement modulation layer The method of C61, comprising a cyclic redundancy check (CRC) masked by a network temporary identifier (C-RNTI).
[C64]
  The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. The method of C63, comprising a cell RNTI (SC-RNTI).
[C65]
  Transmission energy ratio between the basic modulation layer and the enhanced modulation layer, transport block size for the basic modulation layer and the enhanced modulation layer, or modulation and coding for the basic modulation layer and the enhanced modulation layer The method of C49, further comprising receiving signaling information comprising one or more of the schemes.
[C66]
  The method of C65, wherein the signaling information is received in radio resource control (RRC) signaling.
[C67]
  The method of C65, wherein the signaling information is received at the resource grant.
[C68]
  The method of C65, wherein the signaling information is received on a physical control format indicator channel (PCFICH).
[C69]
  The method of C65, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.
[C70]
  The method of C49, wherein the first content comprises control information transmitted on a physical uplink control channel (PUCCH).
[C71]
  The method of C70, wherein the control information comprises one or more of downlink data acknowledgment, channel state information (CSI), rank indicator (RI), or scheduling request (SR).
[C72]
  The method of C71, wherein the control information further comprises uplink information associated with the enhanced modulation layer.
[C73]
  The method of C72, wherein the uplink information associated with the enhanced modulation layer comprises a data rate associated with the enhanced modulation layer.
[C74]
  The method of C49, wherein the second content comprises user data transmitted on a physical uplink shared channel (PUSCH).
[C75]
  A method for wireless communication in a user equipment comprising:
  Determining transmission characteristic information of signals transmitted from neighboring cell user equipment (UE);
  Performing interference reduction on a signal received from a serving cell base station based on the determined transmission characteristic information.
[C76]
  The TDD transmitted from the neighbor cell UE is different from the time division duplex (TDD) uplink / downlink (UL / DL) configuration used by the serving cell base station.  The method of C75, comprising an uplink subframe transmitted from the neighboring cell UE to a neighboring cell base station according to a UL / DL configuration.
[C77]
  The TDD used by the neighbor cell UE  The UL / DL configuration comprises at least one uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmitted from the serving cell base station, according to C76. Method.
[C78]
  The method of C75, wherein the signal transmitted from the neighboring cell UE comprises at least one device-to-device (D2D) transmission to another neighboring cell node.
[C79]
  The method of C78, wherein the at least one D2D transmission is transmitted from the neighboring cell UE during a downlink subframe transmitted from the serving cell base station.
[C80]
  Determining the transmission characteristic information;
  Monitoring transmissions from neighboring cell UEs;
  Determining the transmission characteristic information based on transmissions received while monitoring the transmissions from neighboring cell UEs.
[C81]
  The method of C80, wherein the transmission characteristic information comprises one or more of modulation order, number of spatial layers, or precoding information.
[C82]
  Determining the transmission characteristic information;
  Monitoring transmissions from neighboring cell base stations;
  Determining the transmission characteristic information based on uplink grant information for uplink transmission from the neighboring cell UE, while the uplink grant information monitors the transmission from neighboring cell base stations. The method of C75, received in
[C83]
  Monitoring the transmissions from neighboring cell base stations;
  The method of C82, comprising monitoring a neighbor cell base station physical downlink control channel (PDCCH).
[C84]
  Monitoring the PDCCH of the neighboring cell base station;
  Decoding an uplink grant for the neighbor cell UE;
  Determining the transmission characteristic information of a signal transmitted from the neighboring cell UE based on the decoded uplink grant.
[C85]
  Determining the transmission characteristic information;
  The method of C75, comprising receiving the transmission characteristic information from a serving cell base station.
[C86]
  The serving cell base station according to C85, wherein the serving cell base station receives the transmission characteristic information through an X2 communication link with a neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. Method.
[C87]
  A method for wireless communication in a serving cell base station, comprising:
  Determining first transmission characteristic information of a signal transmitted from a neighboring cell base station;
  Determining second transmission characteristic information of a signal transmitted from a neighboring cell user equipment (UE);
  Performing interference reduction on a signal received from a UE associated with the serving cell base station based on the determined first transmission characteristic information and the second transmission characteristic information.
[C88]
  The TDD transmitted from the neighboring cell base station is different from the time division duplex (TDD) uplink / downlink (UL / DL) configuration used by the serving cell base station.  The method of C87, comprising a downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE according to a UL / DL configuration.
[C89]
  The TDD used by the neighboring cell base station  The method of C88, wherein the UL / DL configuration comprises at least one downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE during an uplink subframe transmitted from the serving cell UE.
[C90]
  The signal transmitted from the neighboring cell UE comprises one or more of an uplink control channel transmission or an uplink data channel transmission during an uplink subframe transmission from the UE associated with the serving cell base station , C87.
[C91]
  Further comprising determining whether the neighbor cell base station or the neighbor cell UE is transmitting during an uplink subframe transmission from the UE associated with the serving cell base station;
  Performing the interference reduction based on whether the neighboring cell base station or neighboring cell UE is transmitting during the uplink subframe transmission from the UE associated with the serving cell base station to C87 The method described.
[C92]
  Determining the second transmission characteristic information of a signal transmitted from the neighboring cell UE;
  Monitoring transmissions from neighboring cell UEs;
  Determining the second transmission characteristic information of a signal transmitted from the neighboring cell UE based on a transmission received while monitoring the transmission from the neighboring cell UE. Method.
[C93]
  The method of C92, wherein the second transmission characteristic information of a signal transmitted from the neighboring cell UE comprises one or more of a modulation order, a number of spatial layers, or precoding information.
[C94]
  Determining the second transmission characteristic information of a signal transmitted from the neighboring cell UE;
  Monitoring transmissions from neighboring cell base stations;
  Determining uplink grant information for uplink transmissions from the neighboring cell UE based on transmissions received while monitoring the transmissions from the neighboring cell base station. Method.
[C95]
  Monitoring the transmissions from neighboring cell base stations;
  109. The method of C94, comprising monitoring a physical downlink control channel (PDCCH) of the neighboring cell base station.
[C96]
  Determining the first transmission characteristic information of a signal transmitted from the neighboring cell base station;
  Monitoring transmissions from neighboring cell base stations;
  Determining downlink transmission characteristic information for downlink transmission from the neighbor cell base station based on transmissions received while monitoring the transmission from the neighbor cell base station to C87 The method described.
[C97]
  Determining the first transmission characteristic information of a signal transmitted from the neighboring cell base station, and determining the second transmission characteristic information of a signal transmitted from the neighboring cell UE.
  The first transmission characteristic information and the second transmission characteristic information are transmitted through an X2 communication link with the neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. The method of C87, comprising receiving.
[C98]
  A method for wireless communication at a receiving node, comprising:
  Establishing a first wireless communication channel for receiving a wireless transmission from a transmitting node;
  Determining transmission channel information of a second wireless communication channel that is different from the first wireless communication channel;
  Performing interference reduction on a signal received on the first wireless communication channel from the transmitting node based on the transmission channel information of the second wireless communication channel.
[C99]
  Determining the transmission channel information of the second wireless communication channel;
  The method of C98, comprising decoding a transmission preamble of a wireless transmission on the second wireless communication channel.
[C100]
  Performing the interference reduction,
  Estimating interference from the second wireless communication channel based on the decoded transmission preamble;
  Performing interference cancellation on the signal received on the first wireless communication channel based on the estimated interference.
[C101]
  The estimated interference is radio frequency (RF) nonlinearity, harmonics introduced from the second wireless communication channel to the first wireless communication channel, intermodulation distortion (IMD) from the second wireless communication channel. ), Channel leakage from the second wireless communication channel, or a coupling between the first wireless communication channel and the second wireless communication channel. Method.
[C102]
  The method of C98, wherein the transmission channel information of the second wireless communication channel comprises co-channel interference between the second wireless communication channel and the first wireless communication channel.
[C103]
  The method of C102, wherein the first wireless communication channel and the second wireless communication channel are associated with nodes operating in an unlicensed spectrum according to different wireless transmission protocols.
[C104]
  The first wireless communication channel is LONG  TERM  EVOLUTION  Associated with a node operating in an unlicensed spectrum in accordance with the (LTE) protocol, and the second wireless communication channel is IEEE  The method of C102, associated with a different node operating in the unlicensed spectrum according to an 802.11 protocol.
[C105]
  The first wireless communication channel is IEEE  Associated with a node operating in an unlicensed spectrum in accordance with the 802.11 protocol, and the second wireless communication channel is LONG  TERM  The method of C102, associated with a different node operating in the unlicensed spectrum according to an EVOLUTION (LTE) protocol.
[C106]
  The method of C98, wherein the second wireless communication channel is an adjacent channel of the first wireless communication channel, and leakage from the adjacent channel causes interference with a signal of the first wireless communication channel. .
[C107]
  The method of C106, wherein the leakage from the adjacent channel causes interference with a signal of the first wireless communication channel.
[C108]
  Performing the interference reduction comprises performing interference cancellation on the signal received on the first wireless communication channel based on the transmission channel information of the second wireless communication channel. , C107.
[C109]
  The sending node is LONG  TERM  The method of C98, wherein the method is a base station or user equipment that operates according to an EVOLUTION (LTE) protocol.
[C110]
  The sending node is IEEE  The method of C98, wherein the method is an access point or station that operates according to the 802.11 protocol.
[C111]
  An apparatus for transmitting hierarchical content comprising:
  Means for identifying first content for transmission and the first content is associated with a first error rate threshold;
  Means for identifying second content for transmission and the second content is associated with a second error rate threshold that is higher than the first error rate threshold;
  Means for modulating the first content on a basic modulation layer;
  Means for modulating the second content on an enhanced modulation layer;
  Means for superimposing the enhancement modulation layer on the basic modulation layer;
  Means for transmitting the superimposed fundamental modulation layer and the enhanced modulation layer.
[C112]
  The apparatus of C111, wherein the first error rate threshold and the second error rate threshold are based on a type of information included in the first content and the second content.
[C113]
  The apparatus of C111, wherein the first content comprises high priority content and the second content comprises low priority content.
[C114]
  The apparatus of C111, wherein the first content and the second content are transmitted to the same user equipment.
[C115]
  The apparatus of C111, wherein the first content and the second content are transmitted to different user equipment.
[C116]
  The apparatus of C111, wherein the first content comprises control information for a user equipment (UE) configured to receive the first content.
[C117]
  The apparatus of C116, wherein the control information comprises one or more of scheduling grant information, acknowledgment information, or signaling information.
[C118]
  The apparatus of C116, wherein the UE is configured to refrain from sending an acknowledgment of receipt of the first content.
[C119]
  The apparatus of C116, wherein the second content comprises user data.
[C120]
  The apparatus of C119, wherein the UE is configured to send an acknowledgment of receipt of the user data.
[C121]
  The control information is transmitted using a physical downlink control channel (PDCCH) on the basic modulation layer, and the user data is transmitted using a physical downlink shared channel (PDSCH) on the enhanced modulation layer. The apparatus of C119.
[C122]
  The first content comprises unicast data that is sensitive to latency for a first user equipment (UE), and the second content is a best effort unicode for the first UE or a different UE. The apparatus according to C111, comprising cast data.
[C123]
  Unicast data that is sensitive to the latency is transmitted using a physical downlink shared channel (PDSCH) on the basic modulation layer, and the best-effort unicast data uses PDSCH on the enhanced modulation layer. The apparatus according to C122, which is transmitted by:
[C124]
  The apparatus of C111, wherein the first content comprises unicast data for a particular user equipment (UE) and the second content comprises broadcast data.
[C125]
  The apparatus of C111, wherein the first content comprises broadcast data and the second content comprises unicast data for a particular user equipment (UE).
[C126]
  The broadcast data is transmitted on the basic modulation layer using a physical multicast channel (PMCH), and the unicast data is transmitted on the enhanced modulation layer using a physical downlink shared channel (PDSCH). The apparatus according to C125.
[C127]
  A UE configured to receive the broadcast data is configured to refrain from sending an acknowledgment of receipt of the broadcast data, and the particular UE sends an acknowledgment of receipt of the unicast data The apparatus of C125, configured to:
[C128]
  Means for determining channel station information (CSI) of a channel to be used for transmission of the base modulation layer and the enhanced modulation layer;
  The apparatus of C111, further comprising means for calculating a transmission energy ratio between the base modulation layer and the enhanced modulation layer based on the CSI.
[C129]
  The means for determining the CSI comprises means for determining the CSI for each of a plurality of transmission time intervals (TTIs), the means for calculating the transmission energy ratio comprising: The apparatus of C128, comprising means for calculating the transmit energy ratio for each of the transmission time intervals TTI.
[C130]
  Means for determining the number of spatial layers available for transmission of the base modulation layer and the enhanced modulation layer;
  The apparatus of C111, further comprising means for transmitting the superimposed base modulation layer and enhancement modulation layer on the determined number of spatial layers.
[C131]
  The apparatus of C130, wherein the means for determining the number of spatial layers comprises means for determining based on a rank indicator (RI) from at least one user equipment.
[C132]
  Means for determining channel state information (CSI) of a plurality of user equipments (UEs);
  Means for instructing which of the plurality of UEs should receive one or more of the base modulation layer or the enhanced modulation layer based on the CSI for the plurality of UEs; The apparatus according to C111.
[C133]
  The means for transmitting the superimposed fundamental modulation layer and enhancement modulation layer;
  Means for transmitting the base modulation layer to one or more UEs determined to have lower channel quality based on the determined CSI;
  The apparatus of C132, comprising: means for transmitting the enhanced modulation layer to the one or more UEs determined to have higher channel quality based on the determined CSI.
[C134]
  The apparatus of C111, further comprising means for transmitting signaling information to at least one user equipment (UE) to receive the superimposed base modulation layer and enhancement modulation layer.
[C135]
  The apparatus of C134, wherein the signaling information comprises a downlink grant for the UE indicating downlink resources for the UE on one or more of the base modulation layer or the enhanced modulation layer.
[C136]
  The downlink grant is
  Resource block location of data transmitted to the UE on one or more of the base modulation layer or the enhanced modulation layer;
  Modulation and coding scheme (MCS) of data transmitted to the UE on one or more of the basic modulation layer or the enhanced modulation layer;
  A precoding matrix used to transmit on one or more of the base modulation layer or the enhancement modulation layer;
  Layer mapping for one or more of the base modulation layer or the enhanced modulation layer;
  Code block size for one or more of the base modulation layer or the enhanced modulation layer, or
  The apparatus of C135, wherein the apparatus indicates one or more of the number of spatial layers for one or more of the base modulation layer or the enhanced modulation layer.
[C137]
  The apparatus of C135, wherein the downlink grant is a single downlink grant comprising information for the base modulation layer or the enhanced modulation layer.
[C138]
  The apparatus of C134, wherein the signaling information comprises two or more downlink grants for two or more UEs, each downlink grant corresponding to the base modulation layer or the enhanced modulation layer.
[C139]
  The apparatus of C138, wherein each downlink grant comprises an indication of the base modulation layer or enhancement modulation layer and downlink resources of the indicated base modulation layer or enhancement modulation layer.
[C140]
  The apparatus of C139, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the downlink grant.
[C141]
  Cell radio network temporary identifier for the UE to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the downlink resource for the base modulation layer or the enhancement modulation layer The apparatus of C139, comprising a cyclic redundancy check (CRC) masked by (C-RNTI).
[C142]
  The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. The apparatus of C141, comprising cell RNTI (SC-RNTI).
[C143]
  The signaling information is a transmission energy ratio between the basic modulation layer and the enhanced modulation layer, a transport block size for the basic modulation layer and the enhanced modulation layer, or for the basic modulation layer and the enhanced modulation layer. The apparatus of C134, comprising one or more of the following modulation and coding schemes.
[C144]
  The apparatus of C134, wherein the signaling information comprises radio resource control (RRC) signaling.
[C145]
  The RRC signaling comprises an energy ratio between the basic modulation layer and the enhancement modulation layer, a modulation scheme for the basic modulation layer, a modulation scheme for the enhancement modulation layer, a resource block size for the basic modulation layer; Or the apparatus of C144, comprising one or more of a resource block size for the enhanced modulation layer.
[C146]
  The apparatus of C134, wherein the signaling information is provided using a physical control format indicator channel (PCFICH).
[C147]
  The apparatus of C134, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.
[C148]
  The apparatus of C111, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.
[C149]
  The apparatus of C111, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.
[C150]
  The modulation scheme for the basic modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature phase amplitude modulation (QAM) scheme in C149 The device described.
[C151]
  A device for wireless communication,
  Means for receiving a signal comprising an enhanced modulation layer superimposed on a base modulation layer;
  Means for performing interference reduction on the received signal to reduce interference from the base modulation layer and to determine that data should be decoded from the enhanced modulation layer;
  Means for decoding said enhancement modulation layer.
[C152]
  The means for performing the interference reduction comprises:
  The apparatus of C151, comprising means for receiving control signaling from the serving base station indicating that data should be decoded from the enhanced modulation layer.
[C153]
  The apparatus of C152, wherein the control signaling comprises a downlink grant indicating a resource to be decoded at the enhanced modulation layer.
[C154]
  The apparatus of C152, wherein the control signaling comprises signal characteristics of the base modulation layer for use in performing the interference reduction.
[C155]
  The apparatus of C152, wherein the control signaling is provided in the base modulation layer.
[C156]
  The means for performing the interference reduction comprises:
  The apparatus of C151, comprising means for performing linear minimum mean square error (MMSE) suppression on the received signal to reduce interference from the base modulation layer.
[C157]
  The means for performing the interference reduction comprises:
  The apparatus of C151, comprising means for performing QR decomposition based spherical decoding (QR-SD) on the received signal to reduce interference from the base modulation layer.
[C158]
  The means for performing the interference reduction comprises:
  The apparatus of C151, comprising means for performing successive interference cancellation (SIC) on the received signal to reduce interference from the base modulation layer.
[C159]
  An apparatus for transmitting hierarchical content comprising:
  Means for receiving a resource grant identifying a hierarchical modulation resource, the hierarchical modulation resource comprising a base modulation layer and an enhancement modulation layer, wherein the base modulation layer has a lower error rate threshold than the enhancement modulation layer Having
  Means for identifying first content for transmission on the base modulation layer;
  Means for identifying second content for transmission on the enhanced modulation layer;
  Means for superimposing the enhancement modulation layer on the basic modulation layer;
  Means for transmitting the superimposed fundamental modulation layer and the enhanced modulation layer.
[C160]
  The apparatus of C159, wherein the base modulation layer comprises a physical uplink control channel (PUCCH) and the enhanced modulation layer comprises a physical uplink shared channel (PUSCH).
[C161]
  The apparatus of C159, wherein both the base modulation layer and the enhanced modulation layer comprise physical uplink shared channels (PUSCH).
[C162]
  The apparatus of C159, wherein the first content comprises high priority content and the second content comprises low priority content.
[C163]
  The means for receiving the resource grant comprises:
  The apparatus of C159, comprising means for receiving an uplink grant from a base station indicating a hierarchical modulation resource for both the base modulation layer and the enhanced modulation layer.
[C164]
  The uplink grant is one of an energy ratio between the basic modulation layer and the enhancement modulation layer, layer mapping information, a code block size, or the number of spatial layers in the basic modulation layer and the enhancement modulation layer. The apparatus of C163, comprising one or more.
[C165]
  The apparatus of C163, wherein the uplink grant further indicates a number of spatial layers for transmission of the base modulation layer and the enhanced modulation layer.
[C166]
  The apparatus of C159, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.
[C167]
  The apparatus of C159, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.
[C168]
  The modulation scheme for the basic modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature phase amplitude modulation (QAM) scheme, to C167 The device described.
[C169]
  The means for receiving the resource grant comprises:
  Means for receiving a first uplink grant indicating a hierarchical modulation resource for the base modulation layer from a base station;
  And an apparatus for receiving a second uplink grant indicating a hierarchical modulation resource for the enhanced modulation layer from the base station.
[C170]
  The apparatus of C169, wherein the first uplink grant and the second uplink grant include spatial information indicating a number of spatial layers in a corresponding modulation layer.
[C171]
  The first uplink grant and the second uplink grant comprise an indication of the base modulation layer or the enhancement modulation layer and uplink resources of the indicated base modulation layer or enhancement modulation layer. The device described in 1.
[C172]
  The apparatus of C171, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the first uplink grant and the second uplink grant.
[C173]
  Cell radio for user equipment (UE) to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the uplink resource for the base modulation layer or the enhancement modulation layer The apparatus of C171, comprising a cyclic redundancy check (CRC) masked by a network temporary identifier (C-RNTI).
[C174]
  The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. The apparatus of C173, comprising a cell RNTI (SC-RNTI).
[C175]
  Transmission energy ratio between the basic modulation layer and the enhanced modulation layer, transport block size for the basic modulation layer and the enhanced modulation layer, or modulation and coding for the basic modulation layer and the enhanced modulation layer The apparatus of C159, further comprising means for receiving signaling information comprising one or more of the schemes.
[C176]
  The apparatus of C175, wherein the signaling information is received in radio resource control (RRC) signaling.
[C177]
  The apparatus of C175, wherein the signaling information is received at the resource grant.
[C178]
  The apparatus of C175, wherein the signaling information is received on a physical control format indicator channel (PCFICH).
[C179]
  The apparatus of C175, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.
[C180]
  The apparatus of C159, wherein the first content comprises control information transmitted on a physical uplink control channel (PUCCH).
[C181]
  The apparatus of C180, wherein the control information comprises one or more of downlink data acknowledgment, channel state information (CSI), rank indicator (RI), or scheduling request (SR).
[C182]
  The apparatus of C181, wherein the control information further comprises uplink information associated with the enhanced modulation layer.
[C183]
  The apparatus of C182, wherein the uplink information associated with the enhanced modulation layer comprises a data rate associated with the enhanced modulation layer.
[C184]
  The apparatus of C159, wherein the second content comprises user data transmitted on a physical uplink shared channel (PUSCH).
[C185]
  An apparatus for wireless communication in a user equipment comprising:
  Means for determining transmission characteristic information of a signal transmitted from a neighboring cell user equipment (UE);
  Means for performing interference cancellation on a signal received from a serving cell base station based on the determined transmission characteristic information.
[C186]
  The TDD transmitted from the neighbor cell UE is different from the time division duplex (TDD) uplink / downlink (UL / DL) configuration used by the serving cell base station.  The apparatus of C185, comprising an uplink subframe transmitted from the neighboring cell UE to a neighboring cell base station according to a UL / DL configuration.
[C187]
  The TDD used by the neighbor cell UE  The apparatus of C186, wherein a UL / DL configuration comprises at least one uplink subframe transmitted from the neighboring cell UE to the neighboring cell base station during a downlink subframe transmission from the serving cell base station. .
[C188]
  The apparatus of C185, wherein the signal transmitted from the neighboring cell UE comprises transmission of at least one device-to-device (D2D) to another neighboring cell node.
[C189]
  The apparatus of C188, wherein the at least one D2D transmission is transmitted during a downlink subframe transmission from the serving cell base station.
[C190]
  The means for determining the transmission characteristic information comprises:
  Means for monitoring transmissions from neighboring cell UEs;
  The apparatus of C185, comprising means for determining the transmission characteristic information based on transmissions received while monitoring transmissions.
[C191]
  The apparatus of C190, wherein the transmission characteristic information comprises one or more of modulation order, number of spatial layers, or precoding information.
[C192]
  The means for determining the transmission characteristic information comprises:
  Means for monitoring transmissions from neighboring cell base stations;
  Means for determining uplink grant information for uplink transmissions from the neighboring cell UE based on the transmissions received while monitoring transmissions of neighboring cell base stations. apparatus.
[C193]
  Said means for monitoring said transmissions from said neighboring cell base stations;
  The apparatus of C192, comprising means for monitoring a physical downlink control channel (PDCCH) of the neighboring cell base station.
[C194]
  The means for monitoring the PDCCH of the neighboring cell base station;
  Means for decoding an uplink grant to the neighbor cell UE;
  193. The apparatus of C193, comprising: means for determining the transmission characteristic information of a signal transmitted from the neighboring cell UE based on the decoded uplink grant.
[C195]
  The means for determining the transmission characteristic information comprises:
  The apparatus of C185, comprising means for receiving the transmission characteristic information from a serving cell base station.
[C196]
  The serving cell base station according to C195, wherein the serving cell base station receives the transmission characteristic information through an X2 communication link with a neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. apparatus.
[C197]
  An apparatus for wireless communication in a serving cell base station,
  Means for determining first transmission characteristic information of a signal transmitted from a neighboring cell base station;
  Means for determining second transmission characteristic information of a signal transmitted from a neighboring cell user equipment (UE);
  Means for performing interference cancellation on a signal received from a serving cell UE based on the determined first transmission characteristic information and the second transmission characteristic information.
[C198]
  The TDD transmitted from the neighboring cell base station is different from the time division duplex (TDD) uplink / downlink (UL / DL) configuration used by the serving cell base station.  The apparatus of C197, comprising a downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE according to a UL / DL configuration.
[C199]
  The TDD used by the neighboring cell base station  The apparatus of C198, wherein a UL / DL configuration comprises at least one downlink subframe transmitted from the neighboring cell base station to the neighboring cell UE during an uplink subframe transmission from the serving cell UE.
[C200]
  The apparatus of C197, wherein the signal transmitted from the neighbor cell UE comprises one or more of an uplink control channel transmission or an uplink data channel transmission during an uplink subframe transmission from the serving cell UE .
[C201]
  Means for determining that the neighbor cell base station or the neighbor cell UE is transmitting during an uplink subframe transmission from the serving cell UE;
  The means for performing interference cancellation performs the interference cancellation based on whether the neighboring cell base station or a neighboring cell UE is transmitting during the uplink subframe transmission from the serving cell UE. The apparatus of C197, comprising means for:
[C202]
  The means for determining the second transmission characteristic information of a signal transmitted from the neighbor cell UE;
  Means for monitoring transmissions from neighboring cell UEs;
  The apparatus of C197, comprising: means for determining the second transmission characteristic information of a signal transmitted from the neighboring cell UE based on a transmission received while monitoring the transmission.
[C203]
  The apparatus of C202, wherein the second transmission characteristic information of a signal transmitted from the neighboring cell UE comprises one or more of a modulation order, a number of spatial layers, or precoding information.
[C204]
  The means for determining the second transmission characteristic information of a signal transmitted from the neighbor cell UE;
  Means for monitoring transmissions from said neighboring cell base stations;
  Means for determining uplink grant information for uplink transmissions from the neighboring cell UE based on the transmissions received while monitoring transmissions of neighboring cell base stations. apparatus.
[C205]
  Said means for monitoring said transmissions from said neighboring cell base stations;
  The apparatus of C204, comprising means for monitoring a physical downlink control channel (PDCCH) of the neighboring cell base station.
[C206]
  The means for determining the first transmission characteristic information of a signal transmitted from the neighboring cell base station;
  Means for monitoring transmissions from said neighboring cell base stations;
  C197 comprising: means for determining downlink transmission information for downlink transmissions from the neighboring cell base station based on the transmissions received while monitoring transmissions of neighboring cell base stations. Equipment.
[C207]
  The means for determining the first transmission characteristic information of a signal transmitted from the neighboring cell base station, and the second transmission characteristic information of a signal transmitted from the neighboring cell UE Means
  The first transmission characteristic information and the second transmission characteristic information are transmitted through an X2 communication link with the neighboring cell base station or from a central scheduler communicating with the serving cell base station and the neighboring cell base station. The apparatus of C197, comprising means for receiving.
[C208]
  An apparatus for wireless communication at a receiving node, comprising:
  Means for establishing a first wireless communication channel for receiving a wireless transmission from a transmitting node;
  Means for determining transmission channel information of a second wireless communication channel that is different from the first wireless communication channel;
  Means for performing interference reduction on a signal received on the first wireless communication channel from the transmitting node based on the transmission channel information of the second wireless communication channel. .
[C209]
  The means for determining the transmission channel information of the second wireless communication channel;
  The apparatus of C208, comprising means for decoding a transmission preamble of a wireless transmission on the second wireless communication channel.
[C210]
  The means for performing the interference reduction comprises:
  Means for estimating interference from the second wireless communication channel based on the decoded transmission preamble;
  200. The apparatus of C209, comprising: means for performing interference cancellation on the signal received on the first wireless communication channel based on the estimated interference.
[C211]
  The estimated interference is radio frequency (RF) nonlinearity, harmonics introduced from the second wireless communication channel to the first wireless communication channel, intermodulation distortion (IMD) from the second wireless communication channel. ), Channel leakage from the second wireless communication channel, or a coupling between the first and second wireless communication channels, comprising one or more of C210 apparatus.
[C212]
  The apparatus of C208, wherein the transmission channel information of the second wireless communication channel comprises co-channel interference between the second wireless communication channel and the first wireless communication channel.
[C213]
  The apparatus of C212, wherein the first wireless communication channel and the second wireless communication channel are associated with a node operating in an unlicensed spectrum according to different wireless transmission protocols.
[C214]
  The first wireless communication channel is LONG  TERM  EVOLUTION  Associated with a node operating in an unlicensed spectrum in accordance with the (LTE) protocol, and the second wireless communication channel is IEEE  The apparatus of C212, associated with a different node operating in the unlicensed spectrum according to an 802.11 protocol.
[C215]
  The first wireless communication channel is IEEE  Associated with a node operating in an unlicensed spectrum in accordance with the 802.11 protocol, and the second wireless communication channel is LONG  TERM  The apparatus of C212, associated with a different node operating in the unlicensed spectrum according to an EVOLUTION (LTE) protocol.
[C216]
  The apparatus of C208, wherein the second wireless communication channel is an adjacent channel of the first wireless communication channel, and leakage from the adjacent channel causes interference with a signal of the first wireless communication channel. .
[C217]
  The apparatus of C216, wherein the leakage from the adjacent channel causes interference with a signal of the first wireless communication channel.
[C218]
  The means for performing the interference reduction comprises:
  The apparatus of C217, comprising means for performing interference cancellation on the signal received on the first wireless communication channel based on the transmission channel information of the second wireless communication channel.
[C219]
  The sending node is LONG  TERM  The apparatus of C208, wherein the apparatus is a base station or user equipment that operates according to an EVOLUTION (LTE) protocol.
[C220]
  The sending node is IEEE  The apparatus of C208, wherein the apparatus is an access point or a station that operates according to the 802.11 protocol

Claims (132)

A method for transmitting hierarchical content comprising:
Transmitting a downlink grant identifying a hierarchical modulation resource comprising a base modulation layer and an enhanced modulation layer for at least one user equipment (UE);
Modulating a first content on the base modulation layer, the first content being associated with a first error rate threshold;
Modulating a second content on the enhancement modulation layer, the second content being associated with a second error rate threshold that is higher than the first error rate threshold;
Transmitting the first content and the second content to the at least one UE as a superposition of the enhanced modulation layer to the base modulation layer using the hierarchical modulation resource.   The method of claim 1, wherein the first error rate threshold and the second error rate threshold are based on a type of information contained in the first content, the second content, or both. .   The method of claim 1, wherein the first content comprises high priority content and the second content comprises low priority content.   The method of claim 1, wherein the first content and the second content are transmitted to the same UE.   The method of claim 1, wherein the first content and the second content are transmitted to different UEs.   The method of claim 1, wherein the first content comprises control information for a UE configured to receive the first content.   The method of claim 6, wherein the control information comprises one or more of scheduling grant information, acknowledgment information, or signaling information.   The method of claim 6, wherein the UE is configured to refrain from sending an acknowledgment of receipt of the control information.   The method of claim 6, wherein the second content comprises user data.   The method of claim 9, wherein the UE is configured to send an acknowledgment of receipt of the user data.   The control information is transmitted using a physical downlink control channel (PDCCH) on the basic modulation layer, and the user data is transmitted using a physical downlink shared channel (PDSCH) on the enhanced modulation layer. 10. The method of claim 9, wherein:   The first content comprises unicast data that is highly sensitive to latency for the first UE, and the second content comprises best effort unicast data for the first UE or a different UE. The method of claim 1.   Uniform data that is sensitive to the latency is transmitted using a physical downlink shared channel (PDSCH) on the basic modulation layer, and the best effort unicast data is transmitted on a second PDSCH on the enhanced modulation layer. 13. The method of claim 12, wherein the method is transmitted using.   The method of claim 1, wherein the first content comprises unicast data for a particular UE and the second content comprises broadcast data.   The method of claim 1, wherein the first content comprises broadcast data and the second content comprises unicast data for a particular UE.   The broadcast data is transmitted on the basic modulation layer using a physical multicast channel (PMCH), and the unicast data is transmitted on the enhanced modulation layer using a physical downlink shared channel (PDSCH). The method according to claim 15.   A UE configured to receive the broadcast data is configured to refrain from sending an acknowledgment of receipt of the broadcast data, and the particular UE sends an acknowledgment of receipt of the unicast data The method of claim 15, wherein the method is configured to: Determining channel state information (CSI) for a channel to be used for transmission of the base modulation layer and the enhanced modulation layer;
The method of claim 1, further comprising calculating a transmission energy ratio between the base modulation layer and the enhanced modulation layer based on the CSI.   The method of claim 18, wherein determining the CSI and calculating the transmit energy ratio is performed for each of a plurality of transmission time intervals (TTIs). Determining the number of spatial layers available for transmission of the base modulation layer and the enhanced modulation layer;
The method of claim 1, further comprising transmitting the superimposed base modulation layer and enhancement modulation layer on the determined number of spatial layers.   21. The method of claim 20, wherein the determining the number of spatial layers is based on a rank indicator (RI) from the at least one UE. Determining channel state information (CSI) for each of a plurality of UEs;
Instructing which of the plurality of UEs should receive one or more of the base modulation layer or the enhanced modulation layer based on the CSI for the plurality of UEs. The method of claim 1. Transmitting the superimposed basic modulation layer and the enhanced modulation layer;
Transmitting the basic modulation layer to the one or more UEs determined to have lower channel quality based on the determined CSI;
23. The method of claim 22, comprising transmitting the enhanced modulation layer to the one or more UEs determined to have higher channel quality based on the determined CSI.   The method of claim 1, wherein the downlink grant includes signaling information for the at least one UE to receive the superimposed base modulation layer and enhancement modulation layer.   The signaling information is a transmission energy ratio between the basic modulation layer and the enhanced modulation layer, a transport block size for the basic modulation layer and the enhanced modulation layer, or for the basic modulation layer and the enhanced modulation layer. 25. The method of claim 24, comprising one or more of: modulation and coding schemes. The downlink grant is
A resource block location of data transmitted to the UE on one or more of the base modulation layer or the enhanced modulation layer;
Code block size for one or more of the base modulation layer or the enhanced modulation layer, or
The method of claim 1, wherein one or more of the number of spatial layers for one or more of the base modulation layer or the enhanced modulation layer is indicated. The downlink grant is
Modulation and coding scheme (MCS) of data transmitted to the UE on one or more of the basic modulation layer or the enhanced modulation layer;
A precoding matrix used to transmit on one or more of the base modulation layer or the enhancement modulation layer, or
The method of claim 1, wherein one or more of layer mappings for one or more of the base modulation layer or the enhanced modulation layer are indicated.   The method of claim 1, wherein the downlink grant is a single downlink grant comprising information for the base modulation layer or the enhanced modulation layer.   The method of claim 1, wherein the downlink grant comprises two or more downlink grants for two or more UEs, each downlink grant corresponding to the base modulation layer or the enhanced modulation layer. .   30. The method of claim 29, wherein each downlink grant comprises an indication of the base modulation layer or enhancement modulation layer and downlink resources of the indicated base modulation layer or enhancement modulation layer.   31. The method of claim 30, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the downlink grant.   The indication of the base modulation layer or the enhancement modulation layer indicates one of the two or more UEs to indicate that the downlink resource is for the base modulation layer or the enhancement modulation layer. 31. The method of claim 30, comprising a cyclic redundancy check (CRC) masked by a cell radio network temporary identifier (C-RNTI) for one UE.   The C-RNTI for the basic modulation layer comprises a primary cell radio network temporary identifier (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is for the UE 33. The method of claim 32, comprising a secondary cell radio network temporary identifier (SC-RNTI).   25. The method of claim 24, wherein the signaling information comprises radio resource control (RRC) signaling.   The RRC signaling comprises an energy ratio between the basic modulation layer and the enhancement modulation layer, a modulation scheme for the basic modulation layer, a modulation scheme for the enhancement modulation layer, a resource block size for the basic modulation layer; 35. The method of claim 34, comprising one or more of: or a resource block size for the enhanced modulation layer.   25. The method of claim 24, wherein the signaling information is provided using a physical control format indicator channel (PCFICH).   25. The method of claim 24, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.   The method of claim 1, wherein the base modulation layer and the enhancement modulation layer have the same modulation scheme.   The method of claim 1, wherein the base modulation layer and the enhancement modulation layer have different modulation schemes.   The modulation scheme for the base modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature amplitude modulation (QAM) scheme. 40. The method according to 39. A method for transmitting hierarchical content comprising:
Receiving a resource grant identifying a hierarchical modulation resource; and the hierarchical modulation resource comprises a base modulation layer and an enhancement modulation layer, the base modulation layer having a lower error rate threshold than the enhancement modulation layer ,
Modulating the first content for transmission on the basic modulation layer;
Modulating second content for transmission on the enhanced modulation layer;
Transmitting the first content and the second content as a superposition of the enhanced modulation layer to the base modulation layer using the hierarchical modulation resource.   42. The method of claim 41, wherein the base modulation layer comprises a physical uplink control channel (PUCCH) and the enhanced modulation layer comprises a physical uplink shared channel (PUSCH).   42. The method of claim 41, wherein both the base modulation layer and the enhanced modulation layer comprise physical uplink shared channels (PUSCH).   42. The method of claim 41, wherein the first content comprises high priority content and the second content comprises low priority content. Receiving the resource grant;
42. The method of claim 41, comprising receiving an uplink grant from a base station indicating hierarchical modulation resources for both the base modulation layer and the enhanced modulation layer.   The uplink grant is one of an energy ratio between the basic modulation layer and the enhancement modulation layer, layer mapping information, a code block size, or the number of spatial layers in the basic modulation layer and the enhancement modulation layer. 46. The method of claim 45, comprising one or more.   The method of claim 45, wherein the uplink grant further indicates a number of spatial layers for transmission of the base modulation layer and the enhanced modulation layer.   42. The method of claim 41, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.   42. The method of claim 41, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.   The modulation scheme for the base modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature amplitude modulation (QAM) scheme. 49. The method according to 49. Receiving the resource grant;
Receiving a first uplink grant indicating a hierarchical modulation resource for the base modulation layer from a base station;
42. The method of claim 41, comprising receiving a second uplink grant from the base station indicating a hierarchical modulation resource for the enhanced modulation layer.   52. The method of claim 51, wherein the first uplink grant and the second uplink grant include spatial information indicating a number of spatial layers within a corresponding modulation layer.   The first uplink grant and the second uplink grant comprise an indication of the base modulation layer or the enhancement modulation layer and uplink resources of the indicated base modulation layer or enhancement modulation layer. Item 52. The method according to Item 51.   54. The method of claim 53, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the first uplink grant and the second uplink grant.   Cell radio for user equipment (UE) to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the uplink resource for the base modulation layer or the enhancement modulation layer 54. The method of claim 53, comprising a cyclic redundancy check (CRC) masked by a network temporary identifier (C-RNTI).   The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. 56. The method of claim 55, comprising a cell RNTI (SC-RNTI).   Transmission energy ratio between the basic modulation layer and the enhanced modulation layer, transport block size for the basic modulation layer and the enhanced modulation layer, or modulation and coding for the basic modulation layer and the enhanced modulation layer 42. The method of claim 41, further comprising receiving signaling information comprising one or more of the schemes.   58. The method of claim 57, wherein the signaling information is received in radio resource control (RRC) signaling.   58. The method of claim 57, wherein the signaling information is received at the resource grant.   58. The method of claim 57, wherein the signaling information is received on a physical control format indicator channel (PCFICH).   58. The method of claim 57, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.   42. The method of claim 41, wherein the first content comprises control information transmitted on a physical uplink control channel (PUCCH).   63. The method of claim 62, wherein the control information comprises one or more of downlink data acknowledgment, channel state information (CSI), rank indicator (RI), or scheduling request (SR).   64. The method of claim 63, wherein the control information further comprises uplink information associated with the enhanced modulation layer.   The method of claim 64, wherein the uplink information associated with the enhanced modulation layer comprises a data rate associated with the enhanced modulation layer.   42. The method of claim 41, wherein the second content comprises user data transmitted on a physical uplink shared channel (PUSCH). An apparatus for transmitting hierarchical content comprising:
A processor;
Memory in electronic communication with the processor;
An instruction stored in the memory, the instruction comprising:
Sending a downlink grant identifying a hierarchical modulation resource comprising a base modulation layer and an enhanced modulation layer for at least one user equipment (UE);
Modulating a first content on the base modulation layer, the first content being associated with a first error rate threshold;
Modulating a second content on the enhancement modulation layer, the second content being associated with a second error rate threshold that is higher than the first error rate threshold;
Performed by the processor to transmit the first content and the second content to the at least one UE as a superposition of the enhanced modulation layer to the base modulation layer using the hierarchical modulation resource Device possible.   68. The apparatus of claim 67, wherein the first error rate threshold and the second error rate threshold are based on a type of information contained in the first content, the second content, or both. .   68. The apparatus of claim 67, wherein the first content comprises high priority content and the second content comprises low priority content.   68. The apparatus of claim 67, wherein the first content and the second content are transmitted to the same UE.   68. The apparatus of claim 67, wherein the first content and the second content are transmitted to different UEs.   68. The apparatus of claim 67, wherein the first content comprises control information for a UE configured to receive the first content.   The apparatus of claim 72, wherein the control information comprises one or more of scheduling grant information, acknowledgment information, or signaling information.   75. The apparatus of claim 72, wherein the UE is configured to refrain from sending an acknowledgment of receipt of the first content.   The apparatus of claim 72, wherein the second content comprises user data.   The apparatus of claim 75, wherein the UE is configured to send an acknowledgment of receipt of the user data.   The control information is transmitted using a physical downlink control channel (PDCCH) on the basic modulation layer, and the user data is transmitted using a physical downlink shared channel (PDSCH) on the enhanced modulation layer. 76. The apparatus of claim 75, wherein:   The first content comprises unicast data that is highly sensitive to latency for the first UE, and the second content comprises best effort unicast data for the first UE or a different UE. 68. The apparatus of claim 67.   Uniform data that is sensitive to the latency is transmitted using a physical downlink shared channel (PDSCH) on the basic modulation layer, and the best effort unicast data is transmitted on a second PDSCH on the enhanced modulation layer. 80. The apparatus of claim 78, transmitted using.   68. The apparatus of claim 67, wherein the first content comprises unicast data for a particular UE and the second content comprises broadcast data.   68. The apparatus of claim 67, wherein the first content comprises broadcast data and the second content comprises unicast data for a particular UE.   The broadcast data is transmitted on the basic modulation layer using a physical multicast channel (PMCH), and the unicast data is transmitted on the enhanced modulation layer using a physical downlink shared channel (PDSCH). 82. The apparatus of claim 81.   A UE configured to receive the broadcast data is configured to refrain from sending an acknowledgment of receipt of the broadcast data, and the particular UE sends an acknowledgment of receipt of the unicast data 82. The apparatus of claim 81, configured to: The instructions further include
Determining channel state information (CSI) for a channel to be used for transmission of the base modulation layer and the enhancement modulation layer;
68. The apparatus of claim 67, executable by the processor to calculate a transmission energy ratio between the base modulation layer and the enhanced modulation layer based on the CSI.   85. The apparatus of claim 84, wherein the instructions are further executable to determine the CSI and calculate the transmit energy ratio for each of a plurality of transmission time intervals (TTIs). The instructions further include
Determining the number of spatial layers available for transmission of the base modulation layer and the enhanced modulation layer;
68. The apparatus of claim 67, executable by the processor to transmit the superimposed base modulation layer and enhancement modulation layer on the determined number of spatial layers.   87. The apparatus of claim 86, wherein the instructions are further executable to determine the number of spatial layers based on a rank indicator (RI) from the at least one UE. The instructions further include
Determining channel state information (CSI) for each of the plurality of UEs;
Based on the CSI for the plurality of UEs, the processor to instruct which of the plurality of UEs should receive one or more of the base modulation layer or the enhancement modulation layer 68. The apparatus of claim 67, wherein the apparatus is executable by: The instructions executable by the processor to transmit the superimposed base modulation layer and enhancement modulation layer are:
Transmitting the base modulation layer to the one or more UEs determined to have lower channel quality based on the determined CSI;
89. The method of claim 88, comprising instructions executable by the processor to transmit the enhanced modulation layer to the one or more UEs determined to have higher channel quality based on the determined CSI. The device described. The instructions further include
68. The method of claim 67, executable by the processor to transmit signaling information for the at least one user equipment (UE) to receive the superimposed base modulation layer and enhancement modulation layer. apparatus.   The signaling information is a transmission energy ratio between the basic modulation layer and the enhanced modulation layer, a transport block size for the basic modulation layer and the enhanced modulation layer, or for the basic modulation layer and the enhanced modulation layer. 94. The apparatus of claim 90, comprising one or more of: modulation and coding schemes.   94. The apparatus of claim 90, wherein the signaling information comprises radio resource control (RRC) signaling.   The RRC signaling comprises an energy ratio between the basic modulation layer and the enhancement modulation layer, a modulation scheme for the basic modulation layer, a modulation scheme for the enhancement modulation layer, a resource block size for the basic modulation layer; 94. The apparatus of claim 92, comprising one or more of: a resource block size for the enhanced modulation layer.   94. The apparatus of claim 90, wherein the signaling information is provided using a physical control format indicator channel (PCFICH).   The apparatus of claim 90, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer. The downlink grant is
A resource block location of data transmitted to the UE on one or more of the base modulation layer or the enhanced modulation layer;
Code block size for one or more of the base modulation layer or the enhanced modulation layer, or
68. The apparatus of claim 67, indicating one or more of a number of spatial layers for one or more of the base modulation layer or the enhanced modulation layer. The downlink grant is
Modulation and coding scheme (MCS) of data transmitted to the UE on one or more of the basic modulation layer or the enhanced modulation layer;
A precoding matrix used to transmit on one or more of the base modulation layer or the enhancement modulation layer, or
68. The apparatus of claim 67, wherein one or more of layer mappings for one or more of the base modulation layer or the enhanced modulation layer are indicated.   68. The apparatus of claim 67, wherein the downlink grant is a single downlink grant comprising information for the base modulation layer or the enhanced modulation layer.   68. The apparatus of claim 67, wherein the downlink grant comprises two or more downlink grants for two or more UEs, each downlink grant corresponding to the base modulation layer or the enhanced modulation layer. .   100. The apparatus of claim 99, wherein each downlink grant comprises an indication of the base modulation layer or enhancement modulation layer and downlink resources of the indicated base modulation layer or enhancement modulation layer.   101. The apparatus of claim 100, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the downlink grant.   The indication of the base modulation layer or the enhancement modulation layer indicates one of the two or more UEs to indicate that the downlink resource is for the base modulation layer or the enhancement modulation layer. 101. The apparatus of claim 100, comprising a cyclic redundancy check (CRC) masked by a cell radio network temporary identifier (C-RNTI) for one UE.   The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. 104. The apparatus of claim 102, comprising a cell RNTI (SC-RNTI).   68. The apparatus of claim 67, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.   68. The apparatus of claim 67, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.   The modulation scheme for the base modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature amplitude modulation (QAM) scheme. 105. The apparatus according to 105. An apparatus for transmitting hierarchical content comprising:
A processor;
Memory in electronic communication with the processor;
An instruction stored in the memory, the instruction comprising:
Receiving a resource grant identifying a hierarchical modulation resource, the hierarchical modulation resource comprising a base modulation layer and an enhancement modulation layer, wherein the base modulation layer has a lower error rate threshold than the enhancement modulation layer;
Modulating a first content for transmission on the basic modulation layer;
Modulating second content for transmission on the enhanced modulation layer;
An apparatus executable by the processor to transmit the first content and the second content as a superposition of the enhanced modulation layer to the base modulation layer using the hierarchical modulation resource.   108. The apparatus of claim 107, wherein the basic modulation layer comprises a physical uplink control channel (PUCCH) and the enhanced modulation layer comprises a physical uplink shared channel (PUSCH).   108. The apparatus of claim 107, wherein both the base modulation layer and the enhanced modulation layer comprise physical uplink shared channels (PUSCH).   108. The apparatus of claim 107, wherein the first content comprises high priority content and the second content comprises low priority content. The instructions executable by the processor to receive the resource grant;
108. The apparatus of claim 107, comprising instructions executable by the processor to receive an uplink grant indicating a hierarchical modulation resource for both the base modulation layer and the enhanced modulation layer from a base station. .   The uplink grant is one of an energy ratio between the basic modulation layer and the enhancement modulation layer, layer mapping information, a code block size, or the number of spatial layers in the basic modulation layer and the enhancement modulation layer. 112. The apparatus of claim 111, comprising one or more.   112. The apparatus of claim 111, wherein the uplink grant further indicates a number of spatial layers for transmission of the base modulation layer and the enhanced modulation layer.   108. The apparatus of claim 107, wherein the base modulation layer and the enhanced modulation layer have the same modulation scheme.   108. The apparatus of claim 107, wherein the base modulation layer and the enhanced modulation layer have different modulation schemes.   The modulation scheme for the base modulation layer and the enhancement modulation layer comprises a quadrature phase shift keying (QPSK) scheme, a binary phase shift keying (BPSK) scheme, or a quadrature amplitude modulation (QAM) scheme. 115. The apparatus according to 115. The instructions executable by the processor to receive the resource grant;
Receiving a first uplink grant indicating a hierarchical modulation resource for the base modulation layer from a base station;
108. The apparatus of claim 107, comprising instructions executable by the processor to receive a second uplink grant indicating a hierarchical modulation resource for the enhanced modulation layer from the base station.   118. The apparatus of claim 117, wherein the first uplink grant and the second uplink grant include spatial information indicating a number of spatial layers in a corresponding modulation layer.   The first uplink grant and the second uplink grant comprise an indication of the base modulation layer or the enhancement modulation layer and uplink resources of the indicated base modulation layer or enhancement modulation layer. Item 118. The apparatus according to Item 117.   120. The apparatus of claim 119, wherein the indication of the base modulation layer or the enhanced modulation layer comprises one or more bits embedded in the first uplink grant and the second uplink grant.   Cell radio for user equipment (UE) to indicate that the indication of the base modulation layer or the enhancement modulation layer is for the uplink resource for the base modulation layer or the enhancement modulation layer 120. The apparatus of claim 119, comprising a cyclic redundancy check (CRC) masked by a network temporary identifier (C-RNTI).   The C-RNTI for the basic modulation layer comprises a primary cell RNTI (PC-RNTI) for the UE, and the C-RNTI for the enhanced modulation layer is a secondary for the UE. 122. The apparatus of claim 121, comprising a cell RNTI (SC-RNTI). The instructions further include
Transmission energy ratio between the basic modulation layer and the enhanced modulation layer, transport block size for the basic modulation layer and the enhanced modulation layer, or modulation and coding for the basic modulation layer and the enhanced modulation layer 108. The apparatus of claim 107, executable by the processor to receive signaling information comprising one or more of the schemes.   124. The apparatus of claim 123, wherein the signaling information is received in radio resource control (RRC) signaling.   124. The apparatus of claim 123, wherein the signaling information is received at the resource grant.   124. The apparatus of claim 123, wherein the signaling information is received on a physical control format indicator channel (PCFICH).   124. The apparatus of claim 123, wherein the signaling information comprises independent control information for the base modulation layer and the enhanced modulation layer.   108. The apparatus of claim 107, wherein the first content comprises control information transmitted on a physical uplink control channel (PUCCH).   129. The apparatus of claim 128, wherein the control information comprises one or more of downlink data acknowledgment, channel state information (CSI), rank indicator (RI), or scheduling request (SR).   130. The apparatus of claim 129, wherein the control information further comprises uplink information associated with the enhanced modulation layer.   131. The apparatus of claim 130, wherein the uplink information associated with the enhanced modulation layer comprises a data rate associated with the enhanced modulation layer.   108. The apparatus of claim 107, wherein the second content comprises user data transmitted on a physical uplink shared channel (PUSCH).

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